31312123011242 has 16 divisors (see below), whose sum is σ = 48587909356800. Its totient is φ = 15116156165040.

The previous prime is 31312123011217. The next prime is 31312123011251. The reversal of 31312123011242 is 24211032121313.

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 7 ways as a sum of consecutive naturals, for example, 41616767 + ... + 42362477.

It is an arithmetic number, because the mean of its divisors is an integer number (3036744334800).

Almost surely, 2^{31312123011242} is an apocalyptic number.

31312123011242 is a deficient number, since it is larger than the sum of its proper divisors (17275786345558).

31312123011242 is a wasteful number, since it uses less digits than its factorization.

31312123011242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469701.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 31312123011242 its reverse (24211032121313), we get a palindrome (55523155132555).

The spelling of 31312123011242 in words is "thirty-one trillion, three hundred twelve billion, one hundred twenty-three million, eleven thousand, two hundred forty-two".