21120102010012 has 12 divisors (see below), whose sum is σ = 37566083083816. Its totient is φ = 10386935414640.

The previous prime is 21120102010001. The next prime is 21120102010013. The reversal of 21120102010012 is 21001020102112.

It is a junction number, because it is equal to n+sod(n) for n = 21120102009974 and 21120102010001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120102010013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43278897318 + ... + 43278897805.

Almost surely, 2^{21120102010012} is an apocalyptic number.

It is an amenable number.

21120102010012 is a deficient number, since it is larger than the sum of its proper divisors (16445981073804).

21120102010012 is a wasteful number, since it uses less digits than its factorization.

21120102010012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86557795188 (or 86557795186 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21120102010012 its reverse (21001020102112), we get a palindrome (42121122112124).

The spelling of 21120102010012 in words is "twenty-one trillion, one hundred twenty billion, one hundred two million, ten thousand, twelve".