311121113142 has 32 divisors (see below), whose sum is σ = 711154185984. Its totient is φ = 88889220000.

The previous prime is 311121113141. The next prime is 311121113179. The reversal of 311121113142 is 241311121113.

It is a happy number.

It is a super-2 number, since 2×311121113142² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 1792392 + ... + 1958292.

It is an arithmetic number, because the mean of its divisors is an integer number (22223568312).

Almost surely, 2^311121113142 is an apocalyptic number.

311121113142 is an abundant number, since it is smaller than the sum of its proper divisors (400033072842).

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

311121113142 is a wasteful number, since it uses less digits than its factorization.

311121113142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210564.

The product of its digits is 144, while the sum is 21.

Adding to 311121113142 its reverse (241311121113), we get a palindrome (552432234255).

The spelling of 311121113142 in words is "three hundred eleven billion, one hundred twenty-one million, one hundred thirteen thousand, one hundred forty-two".