311220022021 has 8 divisors (see below), whose sum is σ = 327917793600. Its totient is φ = 294554027520.

The previous prime is 311220022007. The next prime is 311220022063. The reversal of 311220022021 is 120220022113.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 311220022021 - 2¹⁹ = 311219497733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311220021986 and 311220022004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311220022121) 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, 7924156 + ... + 7963333.

It is an arithmetic number, because the mean of its divisors is an integer number (40989724200).

Almost surely, 2^311220022021 is an apocalyptic number.

It is an amenable number.

311220022021 is a deficient number, since it is larger than the sum of its proper divisors (16697771579).

311220022021 is a wasteful number, since it uses less digits than its factorization.

311220022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15888539.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 311220022021 its reverse (120220022113), we get a palindrome (431440044134).

The spelling of 311220022021 in words is "three hundred eleven billion, two hundred twenty million, twenty-two thousand, twenty-one".