31123022022011 has 4 divisors (see below), whose sum is σ = 31166308562400. Its totient is φ = 31079735481624.

The previous prime is 31123022021969. The next prime is 31123022022019. The reversal of 31123022022011 is 11022022032113.

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

It is a cyclic number.

It is not a de Polignac number, because 31123022022011 - 2¹⁸ = 31123021759867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31123022022019) 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, 21643269116 + ... + 21643270553.

It is an arithmetic number, because the mean of its divisors is an integer number (7791577140600).

Almost surely, 2^{31123022022011} is an apocalyptic number.

31123022022011 is a deficient number, since it is larger than the sum of its proper divisors (43286540389).

31123022022011 is an equidigital number, since it uses as much as digits as its factorization.

31123022022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43286540388.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31123022022011 its reverse (11022022032113), we get a palindrome (42145044054124).

The spelling of 31123022022011 in words is "thirty-one trillion, one hundred twenty-three billion, twenty-two million, twenty-two thousand, eleven".