313111021020 has 96 divisors (see below), whose sum is σ = 1014027130368. Its totient is φ = 70705957632.

The previous prime is 313111020979. The next prime is 313111021049. The reversal of 313111021020 is 20120111313.

It is a happy number.

It is a super-2 number, since 2×313111021020² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4456119 + ... + 4525838.

It is an arithmetic number, because the mean of its divisors is an integer number (10562782608).

Almost surely, 2^313111021020 is an apocalyptic number.

313111021020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

313111021020 is an abundant number, since it is smaller than the sum of its proper divisors (700916109348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

313111021020 is a wasteful number, since it uses less digits than its factorization.

313111021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8982059 (or 8982057 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 313111021020 its reverse (20120111313), we get a palindrome (333231132333).

The spelling of 313111021020 in words is "three hundred thirteen billion, one hundred eleven million, twenty-one thousand, twenty".