10121213100 has 144 divisors (see below), whose sum is σ = 30198567168. Its totient is φ = 2615304960.

The previous prime is 10121213093. The next prime is 10121213101. The reversal of 10121213100 is 131212101.

10121213100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×10121213100² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (10121213101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2917567 + ... + 2921033.

It is an arithmetic number, because the mean of its divisors is an integer number (209712272).

Almost surely, 2^10121213100 is an apocalyptic number.

10121213100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10121213100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15099283584).

10121213100 is an abundant number, since it is smaller than the sum of its proper divisors (20077354068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10121213100 is a wasteful number, since it uses less digits than its factorization.

10121213100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3784 (or 3777 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 10121213100 its reverse (131212101), we get a palindrome (10252425201).

Subtracting from 10121213100 its reverse (131212101), we obtain a palindrome (9990000999).

The spelling of 10121213100 in words is "ten billion, one hundred twenty-one million, two hundred thirteen thousand, one hundred".