100012111021 has 16 divisors (see below), whose sum is σ = 105872171328. Its totient is φ = 94359888000.

The previous prime is 100012111013. The next prime is 100012111037. The reversal of 100012111021 is 120111210001.

It is not a de Polignac number, because 100012111021 - 2³ = 100012111013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100012110989 and 100012111007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100012111051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102771 + ... + 458896.

It is an arithmetic number, because the mean of its divisors is an integer number (6617010708).

Almost surely, 2^100012111021 is an apocalyptic number.

It is an amenable number.

100012111021 is a deficient number, since it is larger than the sum of its proper divisors (5860060307).

100012111021 is a wasteful number, since it uses less digits than its factorization.

100012111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561852.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 100012111021 its reverse (120111210001), we get a palindrome (220123321022).

The spelling of 100012111021 in words is "one hundred billion, twelve million, one hundred eleven thousand, twenty-one".