31212113231101 has 16 divisors (see below), whose sum is σ = 36076739869440. Its totient is φ = 26687591841280.

The previous prime is 31212113231099. The next prime is 31212113231161. The reversal of 31212113231101 is 10113231121213.

It is a cyclic number.

It is not a de Polignac number, because 31212113231101 - 2¹ = 31212113231099 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 (31212113231161) 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, 55844896 + ... + 56401033.

It is an arithmetic number, because the mean of its divisors is an integer number (2254796241840).

Almost surely, 2^{31212113231101} is an apocalyptic number.

It is an amenable number.

31212113231101 is a deficient number, since it is larger than the sum of its proper divisors (4864626638339).

31212113231101 is a wasteful number, since it uses less digits than its factorization.

31212113231101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112247444.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 31212113231101 its reverse (10113231121213), we get a palindrome (41325344352314).

The spelling of 31212113231101 in words is "thirty-one trillion, two hundred twelve billion, one hundred thirteen million, two hundred thirty-one thousand, one hundred one".