21073250031210 has 48 divisors (see below), whose sum is σ = 59005100090664. Its totient is φ = 5187261545856.

The previous prime is 21073250031199. The next prime is 21073250031241. The reversal of 21073250031210 is 1213005237012.

21073250031210 is a `hidden beast` number, since 2 + 1 + 0 + 7 + 32 + 500 + 3 + 121 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5773097036529 + 15300152994681 = 2402727^2 + 3911541^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9005661237 + ... + 9005663576.

Almost surely, 2^{21073250031210} is an apocalyptic number.

21073250031210 is an abundant number, since it is smaller than the sum of its proper divisors (37931850059454).

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

21073250031210 is a wasteful number, since it uses less digits than its factorization.

21073250031210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18011324839 (or 18011324836 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

Adding to 21073250031210 its reverse (1213005237012), we get a palindrome (22286255268222).

The spelling of 21073250031210 in words is "twenty-one trillion, seventy-three billion, two hundred fifty million, thirty-one thousand, two hundred ten".