21000102212012 has 24 divisors (see below), whose sum is σ = 45818404826880. Its totient is φ = 8181858004560.

The previous prime is 21000102211931. The next prime is 21000102212027. The reversal of 21000102212012 is 21021220100012.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 34091074712 + ... + 34091075327.

It is an arithmetic number, because the mean of its divisors is an integer number (1909100201120).

Almost surely, 2^{21000102212012} is an apocalyptic number.

21000102212012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21000102212012 is an abundant number, since it is smaller than the sum of its proper divisors (24818302614868).

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

21000102212012 is a wasteful number, since it uses less digits than its factorization.

21000102212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68182150061 (or 68182150059 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21000102212012 its reverse (21021220100012), we get a palindrome (42021322312024).

The spelling of 21000102212012 in words is "twenty-one trillion, one hundred two million, two hundred twelve thousand, twelve".