21025274072002 has 4 divisors (see below), whose sum is σ = 31537911108006. Its totient is φ = 10512637036000.

The previous prime is 21025274071999. The next prime is 21025274072017. The reversal of 21025274072002 is 20027047252012.

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., 20506959028521 + 518315043481 = 4528461^2 + 719941^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5256318517999 + ... + 5256318518002.

Almost surely, 2^{21025274072002} is an apocalyptic number.

21025274072002 is a deficient number, since it is larger than the sum of its proper divisors (10512637036004).

21025274072002 is a wasteful number, since it uses less digits than its factorization.

21025274072002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10512637036003.

The product of its (nonzero) digits is 31360, while the sum is 34.

The spelling of 21025274072002 in words is "twenty-one trillion, twenty-five billion, two hundred seventy-four million, seventy-two thousand, two".