31212331313101 has 4 divisors (see below), whose sum is σ = 31212355959772. Its totient is φ = 31212306666432.

The previous prime is 31212331313081. The next prime is 31212331313113. The reversal of 31212331313101 is 10131313321213.

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 18031692147876 + 13180639165225 = 4246374^2 + 3630515^2 .

It is a cyclic number.

It is not a de Polignac number, because 31212331313101 - 2¹¹ = 31212331311053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212331353101) 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, 10314606 + ... + 12992911.

It is an arithmetic number, because the mean of its divisors is an integer number (7803088989943).

Almost surely, 2^{31212331313101} is an apocalyptic number.

It is an amenable number.

31212331313101 is a deficient number, since it is larger than the sum of its proper divisors (24646671).

31212331313101 is a wasteful number, since it uses less digits than its factorization.

31212331313101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24646670.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 31212331313101 its reverse (10131313321213), we get a palindrome (41343644634314).

The spelling of 31212331313101 in words is "thirty-one trillion, two hundred twelve billion, three hundred thirty-one million, three hundred thirteen thousand, one hundred one".