311122021021 has 8 divisors (see below), whose sum is σ = 357410346944. Its totient is φ = 265294275840.

The previous prime is 311122021013. The next prime is 311122021109. The reversal of 311122021021 is 120120221113.

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 311122021021 - 2³ = 311122021013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311122020986 and 311122021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311122051021) 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, 115143735 + ... + 115146436.

It is an arithmetic number, because the mean of its divisors is an integer number (44676293368).

Almost surely, 2^311122021021 is an apocalyptic number.

It is an amenable number.

311122021021 is a deficient number, since it is larger than the sum of its proper divisors (46288325923).

311122021021 is a wasteful number, since it uses less digits than its factorization.

311122021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230290371.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 311122021021 its reverse (120120221113), we get a palindrome (431242242134).

The spelling of 311122021021 in words is "three hundred eleven billion, one hundred twenty-two million, twenty-one thousand, twenty-one".