31011122020201 has 16 divisors (see below), whose sum is σ = 32151163282560. Its totient is φ = 29889372004480.

The previous prime is 31011122020189. The next prime is 31011122020231. The reversal of 31011122020201 is 10202022111013.

It is a de Polignac number, because none of the positive numbers 2^k-31011122020201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31011122020231) 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, 138809055 + ... + 139032283.

It is an arithmetic number, because the mean of its divisors is an integer number (2009447705160).

Almost surely, 2^{31011122020201} is an apocalyptic number.

It is an amenable number.

31011122020201 is a deficient number, since it is larger than the sum of its proper divisors (1140041262359).

31011122020201 is a wasteful number, since it uses less digits than its factorization.

31011122020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264176.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 31011122020201 its reverse (10202022111013), we get a palindrome (41213144131214).

The spelling of 31011122020201 in words is "thirty-one trillion, eleven billion, one hundred twenty-two million, twenty thousand, two hundred one".