31100130121211 has 4 divisors (see below), whose sum is σ = 31100445550632. Its totient is φ = 31099814691792.

The previous prime is 31100130121183. The next prime is 31100130121213. The reversal of 31100130121211 is 11212103100113.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31100130121211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31100130121211.

It is not an unprimeable number, because it can be changed into a prime (31100130121213) 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, 157566770 + ... + 157764023.

It is an arithmetic number, because the mean of its divisors is an integer number (7775111387658).

Almost surely, 2^{31100130121211} is an apocalyptic number.

31100130121211 is a deficient number, since it is larger than the sum of its proper divisors (315429421).

31100130121211 is an equidigital number, since it uses as much as digits as its factorization.

31100130121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315429420.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 31100130121211 its reverse (11212103100113), we get a palindrome (42312233221324).

The spelling of 31100130121211 in words is "thirty-one trillion, one hundred billion, one hundred thirty million, one hundred twenty-one thousand, two hundred eleven".