12101213100 has 72 divisors (see below), whose sum is σ = 36535161600. Its totient is φ = 3086684480.

The previous prime is 12101213063. The next prime is 12101213101. The reversal of 12101213100 is 131210121.

It is a super-2 number, since 2×12101213100² (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 (12101213101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 870000 + ... + 883799.

It is an arithmetic number, because the mean of its divisors is an integer number (507432800).

Almost surely, 2^12101213100 is an apocalyptic number.

12101213100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12101213100 is an abundant number, since it is smaller than the sum of its proper divisors (24433948500).

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

12101213100 is a wasteful number, since it uses less digits than its factorization.

12101213100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753839 (or 1753832 counting only the distinct ones).

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

Adding to 12101213100 its reverse (131210121), we get a palindrome (12232423221).

The spelling of 12101213100 in words is "twelve billion, one hundred one million, two hundred thirteen thousand, one hundred".