311131100120 has 16 divisors (see below), whose sum is σ = 700044975360. Its totient is φ = 124452440032.

The previous prime is 311131100107. The next prime is 311131100149. The reversal of 311131100120 is 21001131113.

It is a happy number.

It is a super-2 number, since 2×311131100120² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311131100095 and 311131100104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3889138712 + ... + 3889138791.

It is an arithmetic number, because the mean of its divisors is an integer number (43752810960).

Almost surely, 2^311131100120 is an apocalyptic number.

It is an amenable number.

311131100120 is an abundant number, since it is smaller than the sum of its proper divisors (388913875240).

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

311131100120 is a wasteful number, since it uses less digits than its factorization.

311131100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7778277514 (or 7778277510 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 311131100120 its reverse (21001131113), we get a palindrome (332132231233).

The spelling of 311131100120 in words is "three hundred eleven billion, one hundred thirty-one million, one hundred thousand, one hundred twenty".