31213003201244 has 48 divisors (see below), whose sum is σ = 55252652974848. Its totient is φ = 15427186080768.

The previous prime is 31213003201117. The next prime is 31213003201253. The reversal of 31213003201244 is 44210230031213.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 598348307 + ... + 598400469.

It is an arithmetic number, because the mean of its divisors is an integer number (1151096936976).

Almost surely, 2^{31213003201244} is an apocalyptic number.

It is an amenable number.

31213003201244 is a deficient number, since it is larger than the sum of its proper divisors (24039649773604).

31213003201244 is a wasteful number, since it uses less digits than its factorization.

31213003201244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55274 (or 55272 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 31213003201244 its reverse (44210230031213), we get a palindrome (75423233232457).

The spelling of 31213003201244 in words is "thirty-one trillion, two hundred thirteen billion, three million, two hundred one thousand, two hundred forty-four".