100012121100 has 108 divisors (see below), whose sum is σ = 321955042864. Its totient is φ = 25949082240.

The previous prime is 100012121071. The next prime is 100012121173. The reversal of 100012121100 is 1121210001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1468384 + ... + 1534983.

Almost surely, 2^100012121100 is an apocalyptic number.

100012121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100012121100 is an abundant number, since it is smaller than the sum of its proper divisors (221942921764).

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

100012121100 is a wasteful number, since it uses less digits than its factorization.

100012121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3003424 (or 3003414 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 100012121100 its reverse (1121210001), we get a palindrome (101133331101).

The spelling of 100012121100 in words is "one hundred billion, twelve million, one hundred twenty-one thousand, one hundred".