31213001022243 has 16 divisors (see below), whose sum is σ = 41797282728960. Its totient is φ = 20718717569984.

The previous prime is 31213001022239. The next prime is 31213001022341. The reversal of 31213001022243 is 34222010031213.

It is a cyclic number.

It is not a de Polignac number, because 31213001022243 - 2² = 31213001022239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31213001022223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2131330 + ... + 8183432.

It is an arithmetic number, because the mean of its divisors is an integer number (2612330170560).

Almost surely, 2^{31213001022243} is an apocalyptic number.

31213001022243 is a deficient number, since it is larger than the sum of its proper divisors (10584281706717).

31213001022243 is a wasteful number, since it uses less digits than its factorization.

31213001022243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6059538.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31213001022243 its reverse (34222010031213), we get a palindrome (65435011053456).

The spelling of 31213001022243 in words is "thirty-one trillion, two hundred thirteen billion, one million, twenty-two thousand, two hundred forty-three".