21100010012012 has 24 divisors (see below), whose sum is σ = 37088640662976. Its totient is φ = 10503257938448.

The previous prime is 21100010011963. The next prime is 21100010012057. The reversal of 21100010012012 is 21021001000112.

It is a junction number, because it is equal to n+sod(n) for n = 21100010011984 and 21100010012002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37496243 + ... + 38054805.

It is an arithmetic number, because the mean of its divisors is an integer number (1545360027624).

Almost surely, 2^{21100010012012} is an apocalyptic number.

It is an amenable number.

21100010012012 is a deficient number, since it is larger than the sum of its proper divisors (15988630650964).

21100010012012 is a wasteful number, since it uses less digits than its factorization.

21100010012012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600397 (or 600395 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21100010012012 its reverse (21021001000112), we get a palindrome (42121011012124).

The spelling of 21100010012012 in words is "twenty-one trillion, one hundred billion, ten million, twelve thousand, twelve".