311122320201021 has 8 divisors (see below), whose sum is σ = 474091154592064. Its totient is φ = 177784182972000.

The previous prime is 311122320201001. The next prime is 311122320201037. The reversal of 311122320201021 is 120102023221113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 311122320201021 - 2²¹ = 311122318103869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 14815348581001 = 311122320201021 / (3 + 1 + 1 + 1 + 2 + 2 + 3 + 2 + 0 + 2 + 0 + 1 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311122320201001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7407674290480 + ... + 7407674290521.

It is an arithmetic number, because the mean of its divisors is an integer number (59261394324008).

Almost surely, 2^{311122320201021} is an apocalyptic number.

It is an amenable number.

311122320201021 is a deficient number, since it is larger than the sum of its proper divisors (162968834391043).

311122320201021 is a wasteful number, since it uses less digits than its factorization.

311122320201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14815348581011.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 311122320201021 its reverse (120102023221113), we get a palindrome (431224343422134).

The spelling of 311122320201021 in words is "three hundred eleven trillion, one hundred twenty-two billion, three hundred twenty million, two hundred one thousand, twenty-one".