311440321010021 has 4 divisors (see below), whose sum is σ = 355931795440032. Its totient is φ = 266948846580012.

The previous prime is 311440321010009. The next prime is 311440321010047. The reversal of 311440321010021 is 120010123044113.

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 a cyclic number.

It is not a de Polignac number, because 311440321010021 - 2²⁶ = 311440253901157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311440321012021) 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, 22245737214995 + ... + 22245737215008.

It is an arithmetic number, because the mean of its divisors is an integer number (88982948860008).

Almost surely, 2^{311440321010021} is an apocalyptic number.

It is an amenable number.

311440321010021 is a deficient number, since it is larger than the sum of its proper divisors (44491474430011).

311440321010021 is an equidigital number, since it uses as much as digits as its factorization.

311440321010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44491474430010.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 311440321010021 its reverse (120010123044113), we get a palindrome (431450444054134).

The spelling of 311440321010021 in words is "three hundred eleven trillion, four hundred forty billion, three hundred twenty-one million, ten thousand, twenty-one".