21221364231202 has 4 divisors (see below), whose sum is σ = 31832046346806. Its totient is φ = 10610682115600.

The previous prime is 21221364231169. The next prime is 21221364231229. The reversal of 21221364231202 is 20213246312212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20114767532601 + 1106596698601 = 4484949^2 + 1051949^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5305341057799 + ... + 5305341057802.

Almost surely, 2^{21221364231202} is an apocalyptic number.

21221364231202 is a deficient number, since it is larger than the sum of its proper divisors (10610682115604).

21221364231202 is a wasteful number, since it uses less digits than its factorization.

21221364231202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10610682115603.

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 21221364231202 in words is "twenty-one trillion, two hundred twenty-one billion, three hundred sixty-four million, two hundred thirty-one thousand, two hundred two".