21000002200212 has 24 divisors (see below), whose sum is σ = 56000005867456. Its totient is φ = 6000000628608.

The previous prime is 21000002200159. The next prime is 21000002200237. The reversal of 21000002200212 is 21200220000012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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, 125000013013 + ... + 125000013180.

Almost surely, 2^{21000002200212} is an apocalyptic number.

It is an amenable number.

21000002200212 is an abundant number, since it is smaller than the sum of its proper divisors (35000003667244).

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

21000002200212 is a wasteful number, since it uses less digits than its factorization.

21000002200212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250000026207 (or 250000026205 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21000002200212 its reverse (21200220000012), we get a palindrome (42200222200224).

The spelling of 21000002200212 in words is "twenty-one trillion, two million, two hundred thousand, two hundred twelve".