201220110031 has 4 divisors (see below), whose sum is σ = 201225214072. Its totient is φ = 201215005992.

The previous prime is 201220109989. The next prime is 201220110043. The reversal of 201220110031 is 130011022102.

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 201220110031 - 2⁷ = 201220109903 is a prime.

It is a super-2 number, since 2×201220110031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201220109993 and 201220110020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220110731) 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, 2492421 + ... + 2571886.

It is an arithmetic number, because the mean of its divisors is an integer number (50306303518).

Almost surely, 2^201220110031 is an apocalyptic number.

201220110031 is a deficient number, since it is larger than the sum of its proper divisors (5104041).

201220110031 is an equidigital number, since it uses as much as digits as its factorization.

201220110031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5104040.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 201220110031 its reverse (130011022102), we get a palindrome (331231132133).

The spelling of 201220110031 in words is "two hundred one billion, two hundred twenty million, one hundred ten thousand, thirty-one".