31311121312211 has 8 divisors (see below), whose sum is σ = 33719718736704. Its totient is φ = 28902530977920.

The previous prime is 31311121312199. The next prime is 31311121312241. The reversal of 31311121312211 is 11221312111313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31311121312211 - 2⁶ = 31311121312147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31311121312241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10595846 + ... + 13224756.

It is an arithmetic number, because the mean of its divisors is an integer number (4214964842088).

Almost surely, 2^{31311121312211} is an apocalyptic number.

31311121312211 is a deficient number, since it is larger than the sum of its proper divisors (2408597424493).

31311121312211 is a wasteful number, since it uses less digits than its factorization.

31311121312211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3545101.

The product of its digits is 216, while the sum is 23.

Adding to 31311121312211 its reverse (11221312111313), we get a palindrome (42532433423524).

The spelling of 31311121312211 in words is "thirty-one trillion, three hundred eleven billion, one hundred twenty-one million, three hundred twelve thousand, two hundred eleven".