31211134220140 has 72 divisors (see below), whose sum is σ = 76262826568320. Its totient is φ = 10698366002688.

The previous prime is 31211134220131. The next prime is 31211134220159. The reversal of 31211134220140 is 4102243111213.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 185956 + ... + 7902964.

It is an arithmetic number, because the mean of its divisors is an integer number (1059205924560).

Almost surely, 2^{31211134220140} is an apocalyptic number.

It is an amenable number.

31211134220140 is an abundant number, since it is smaller than the sum of its proper divisors (45051692348180).

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

31211134220140 is a wasteful number, since it uses less digits than its factorization.

31211134220140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7721159 (or 7721150 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 31211134220140 its reverse (4102243111213), we get a palindrome (35313377331353).

The spelling of 31211134220140 in words is "thirty-one trillion, two hundred eleven billion, one hundred thirty-four million, two hundred twenty thousand, one hundred forty".