31331221313102 has 32 divisors (see below), whose sum is σ = 50787428474880. Its totient is φ = 14449287604320.

The previous prime is 31331221313071. The next prime is 31331221313131. The reversal of 31331221313102 is 20131312213313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45582113 + ... + 46264364.

It is an arithmetic number, because the mean of its divisors is an integer number (1587107139840).

Almost surely, 2^{31331221313102} is an apocalyptic number.

31331221313102 is a deficient number, since it is larger than the sum of its proper divisors (19456207161778).

31331221313102 is a wasteful number, since it uses less digits than its factorization.

31331221313102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91846736.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 31331221313102 its reverse (20131312213313), we get a palindrome (51462533526415).

The spelling of 31331221313102 in words is "thirty-one trillion, three hundred thirty-one billion, two hundred twenty-one million, three hundred thirteen thousand, one hundred two".