21312021302010 has 96 divisors (see below), whose sum is σ = 58296878155152. Its totient is φ = 5394737064960.

The previous prime is 21312021301979. The next prime is 21312021302027. The reversal of 21312021302010 is 1020312021312.

21312021302010 is a `hidden beast` number, since 2 + 131 + 202 + 130 + 201 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 5485699412649 + 15826321889361 = 2342157^2 + 3978231^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77912329 + ... + 78185388.

Almost surely, 2^{21312021302010} is an apocalyptic number.

21312021302010 is an abundant number, since it is smaller than the sum of its proper divisors (36984856853142).

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

21312021302010 is a wasteful number, since it uses less digits than its factorization.

21312021302010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156097808 (or 156097805 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21312021302010 its reverse (1020312021312), we get a palindrome (22332333323322).

The spelling of 21312021302010 in words is "twenty-one trillion, three hundred twelve billion, twenty-one million, three hundred two thousand, ten".