21021201002112 has 64 divisors (see below), whose sum is σ = 57136113233760. Its totient is φ = 6844111948800.

The previous prime is 21021201002111. The next prime is 21021201002119. The reversal of 21021201002112 is 21120010212012.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 21021201002091 and 21021201002100.

It is not an unprimeable number, because it can be changed into a prime (21021201002111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 636526639 + ... + 636559662.

Almost surely, 2^{21021201002112} is an apocalyptic number.

It is an amenable number.

21021201002112 is an abundant number, since it is smaller than the sum of its proper divisors (36114912231648).

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

21021201002112 is a wasteful number, since it uses less digits than its factorization.

21021201002112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273086361 (or 1273086349 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21021201002112 its reverse (21120010212012), we get a palindrome (42141211214124).

The spelling of 21021201002112 in words is "twenty-one trillion, twenty-one billion, two hundred one million, two thousand, one hundred twelve".