31213431212122 has 8 divisors (see below), whose sum is σ = 46820421595872. Its totient is φ = 15606624013500.

The previous prime is 31213431212077. The next prime is 31213431212137. The reversal of 31213431212122 is 22121213431213.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 45369504 + ... + 46052347.

It is an arithmetic number, because the mean of its divisors is an integer number (5852552699484).

Almost surely, 2^{31213431212122} is an apocalyptic number.

31213431212122 is a deficient number, since it is larger than the sum of its proper divisors (15606990383750).

31213431212122 is a wasteful number, since it uses less digits than its factorization.

31213431212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91592564.

The product of its digits is 3456, while the sum is 28.

Adding to 31213431212122 its reverse (22121213431213), we get a palindrome (53334644643335).

The spelling of 31213431212122 in words is "thirty-one trillion, two hundred thirteen billion, four hundred thirty-one million, two hundred twelve thousand, one hundred twenty-two".