31112202201313 has 4 divisors (see below), whose sum is σ = 31113266951188. Its totient is φ = 31111137451440.

The previous prime is 31112202201293. The next prime is 31112202201317. The reversal of 31112202201313 is 31310220221113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14892436701184 + 16219765500129 = 3859072^2 + 4027377^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31112202201313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31112202201317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 532331106 + ... + 532389547.

It is an arithmetic number, because the mean of its divisors is an integer number (7778316737797).

Almost surely, 2^{31112202201313} is an apocalyptic number.

It is an amenable number.

31112202201313 is a deficient number, since it is larger than the sum of its proper divisors (1064749875).

31112202201313 is a wasteful number, since it uses less digits than its factorization.

31112202201313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064749874.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 31112202201313 its reverse (31310220221113), we get a palindrome (62422422422426).

The spelling of 31112202201313 in words is "thirty-one trillion, one hundred twelve billion, two hundred two million, two hundred one thousand, three hundred thirteen".