221023110031 has 4 divisors (see below), whose sum is σ = 221029043200. Its totient is φ = 221017176864.

The previous prime is 221023109999. The next prime is 221023110041. The reversal of 221023110031 is 130011320122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130011320122 = 2 ⋅65005660061.

It is a cyclic number.

It is not a de Polignac number, because 221023110031 - 2⁵ = 221023109999 is a prime.

It is a super-2 number, since 2×221023110031² (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 = 221023109987 and 221023110014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221023110041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2910351 + ... + 2985328.

It is an arithmetic number, because the mean of its divisors is an integer number (55257260800).

Almost surely, 2^221023110031 is an apocalyptic number.

221023110031 is a deficient number, since it is larger than the sum of its proper divisors (5933169).

221023110031 is an equidigital number, since it uses as much as digits as its factorization.

221023110031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5933168.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 221023110031 its reverse (130011320122), we get a palindrome (351034430153).

The spelling of 221023110031 in words is "two hundred twenty-one billion, twenty-three million, one hundred ten thousand, thirty-one".