31110220231211 has 16 divisors (see below), whose sum is σ = 35726142762240. Its totient is φ = 26792375145120.

The previous prime is 31110220231163. The next prime is 31110220231217. The reversal of 31110220231211 is 11213202201113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31110220231211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31110220231217) 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, 1949681 + ... + 8125373.

It is an arithmetic number, because the mean of its divisors is an integer number (2232883922640).

Almost surely, 2^{31110220231211} is an apocalyptic number.

31110220231211 is a deficient number, since it is larger than the sum of its proper divisors (4615922531029).

31110220231211 is a wasteful number, since it uses less digits than its factorization.

31110220231211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6199826.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 31110220231211 its reverse (11213202201113), we get a palindrome (42323422432324).

The spelling of 31110220231211 in words is "thirty-one trillion, one hundred ten billion, two hundred twenty million, two hundred thirty-one thousand, two hundred eleven".