2210312131021 has 4 divisors (see below), whose sum is σ = 2210829409372. Its totient is φ = 2209794852672.

The previous prime is 2210312131019. The next prime is 2210312131031. The reversal of 2210312131021 is 1201312130122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 430185133225 + 1780126997796 = 655885^2 + 1334214^2 .

It is a cyclic number.

It is not a de Polignac number, because 2210312131021 - 2¹ = 2210312131019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2210312131021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2210312131031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258632766 + ... + 258641311.

It is an arithmetic number, because the mean of its divisors is an integer number (552707352343).

Almost surely, 2^{2210312131021} is an apocalyptic number.

It is an amenable number.

2210312131021 is a deficient number, since it is larger than the sum of its proper divisors (517278351).

2210312131021 is an equidigital number, since it uses as much as digits as its factorization.

2210312131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517278350.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 2210312131021 its reverse (1201312130122), we get a palindrome (3411624261143).

The spelling of 2210312131021 in words is "two trillion, two hundred ten billion, three hundred twelve million, one hundred thirty-one thousand, twenty-one".