31211331242 has 64 divisors (see below), whose sum is σ = 57933792000. Its totient is φ = 12280536576.

The previous prime is 31211331227. The next prime is 31211331251. The reversal of 31211331242 is 24213311213.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50585318 + ... + 50585934.

It is an arithmetic number, because the mean of its divisors is an integer number (905215500).

Almost surely, 2^31211331242 is an apocalyptic number.

31211331242 is a deficient number, since it is larger than the sum of its proper divisors (26722460758).

31211331242 is a wasteful number, since it uses less digits than its factorization.

31211331242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695.

The product of its digits is 864, while the sum is 23.

Adding to 31211331242 its reverse (24213311213), we get a palindrome (55424642455).

The spelling of 31211331242 in words is "thirty-one billion, two hundred eleven million, three hundred thirty-one thousand, two hundred forty-two".