31023022122011 has 4 divisors (see below), whose sum is σ = 31208788721712. Its totient is φ = 30837255522312.

The previous prime is 31023022121969. The next prime is 31023022122017. The reversal of 31023022122011 is 11022122032013.

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-31023022122011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31023022122017) 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, 92883299600 + ... + 92883299933.

It is an arithmetic number, because the mean of its divisors is an integer number (7802197180428).

Almost surely, 2^{31023022122011} is an apocalyptic number.

31023022122011 is a deficient number, since it is larger than the sum of its proper divisors (185766599701).

31023022122011 is a wasteful number, since it uses less digits than its factorization.

31023022122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185766599700.

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

Adding to 31023022122011 its reverse (11022122032013), we get a palindrome (42045144154024).

The spelling of 31023022122011 in words is "thirty-one trillion, twenty-three billion, twenty-two million, one hundred twenty-two thousand, eleven".