31121051342 has 32 divisors (see below), whose sum is σ = 48748296960. Its totient is φ = 14884047360.

The previous prime is 31121051341. The next prime is 31121051371. The reversal of 31121051342 is 24315012113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31121051341) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2607284 + ... + 2619192.

It is an arithmetic number, because the mean of its divisors is an integer number (1523384280).

Almost surely, 2^31121051342 is an apocalyptic number.

31121051342 is a deficient number, since it is larger than the sum of its proper divisors (17627245618).

31121051342 is a wasteful number, since it uses less digits than its factorization.

31121051342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12428.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 31121051342 its reverse (24315012113), we get a palindrome (55436063455).

The spelling of 31121051342 in words is "thirty-one billion, one hundred twenty-one million, fifty-one thousand, three hundred forty-two".