311353452021 has 4 divisors (see below), whose sum is σ = 415137936032. Its totient is φ = 207568968012.

The previous prime is 311353451939. The next prime is 311353452049. The reversal of 311353452021 is 120254353113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 311353452021 - 2¹⁹ = 311352927733 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 311353452021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311353452721) 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, 51892242001 + ... + 51892242006.

It is an arithmetic number, because the mean of its divisors is an integer number (103784484008).

Almost surely, 2^311353452021 is an apocalyptic number.

It is an amenable number.

311353452021 is a deficient number, since it is larger than the sum of its proper divisors (103784484011).

311353452021 is a wasteful number, since it uses less digits than its factorization.

311353452021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103784484010.

The product of its (nonzero) digits is 10800, while the sum is 30.

The spelling of 311353452021 in words is "three hundred eleven billion, three hundred fifty-three million, four hundred fifty-two thousand, twenty-one".