21250246122250 has 32 divisors (see below), whose sum is σ = 39780779472720. Its totient is φ = 8500030344000.

The previous prime is 21250246122247. The next prime is 21250246122299. The reversal of 21250246122250 is 5222164205212.

It can be written as a sum of positive squares in 8 ways, for example, as 3126775256361 + 18123470865889 = 1768269^2 + 4257167^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40887016 + ... + 41403484.

Almost surely, 2^{21250246122250} is an apocalyptic number.

21250246122250 is a deficient number, since it is larger than the sum of its proper divisors (18530533350470).

21250246122250 is a wasteful number, since it uses less digits than its factorization.

21250246122250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681067 (or 681057 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The spelling of 21250246122250 in words is "twenty-one trillion, two hundred fifty billion, two hundred forty-six million, one hundred twenty-two thousand, two hundred fifty".