311020111021 has 8 divisors (see below), whose sum is σ = 314560540800. Its totient is φ = 307480699680.

The previous prime is 311020110997. The next prime is 311020111027. The reversal of 311020111021 is 120111020113.

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 311020111021 - 2¹⁵ = 311020078253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311020110992 and 311020111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311020111027) 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, 368266 + ... + 870436.

It is an arithmetic number, because the mean of its divisors is an integer number (39320067600).

Almost surely, 2^311020111021 is an apocalyptic number.

It is an amenable number.

311020111021 is a deficient number, since it is larger than the sum of its proper divisors (3540429779).

311020111021 is an equidigital number, since it uses as much as digits as its factorization.

311020111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509219.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 311020111021 its reverse (120111020113), we get a palindrome (431131131134).

The spelling of 311020111021 in words is "three hundred eleven billion, twenty million, one hundred eleven thousand, twenty-one".