311121113140 has 48 divisors (see below), whose sum is σ = 676468283904. Its totient is φ = 120070051200.

The previous prime is 311121113087. The next prime is 311121113141. The reversal of 311121113140 is 41311121113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311121113141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 552799 + ... + 963238.

It is an arithmetic number, because the mean of its divisors is an integer number (14093089248).

Almost surely, 2^311121113140 is an apocalyptic number.

It is an amenable number.

311121113140 is an abundant number, since it is smaller than the sum of its proper divisors (365347170764).

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

311121113140 is a wasteful number, since it uses less digits than its factorization.

311121113140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516408 (or 1516406 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 311121113140 its reverse (41311121113), we get a palindrome (352432234253).

The spelling of 311121113140 in words is "three hundred eleven billion, one hundred twenty-one million, one hundred thirteen thousand, one hundred forty".