221033113031 has 4 divisors (see below), whose sum is σ = 221252175600. Its totient is φ = 220814050464.

The previous prime is 221033113009. The next prime is 221033113057. The reversal of 221033113031 is 130311330122.

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 221033113031 - 2⁶ = 221033112967 is a prime.

It is a super-2 number, since 2×221033113031² (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 = 221033112994 and 221033113012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221033113001) 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, 109529771 + ... + 109531788.

It is an arithmetic number, because the mean of its divisors is an integer number (55313043900).

Almost surely, 2^221033113031 is an apocalyptic number.

221033113031 is a deficient number, since it is larger than the sum of its proper divisors (219062569).

221033113031 is a wasteful number, since it uses less digits than its factorization.

221033113031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219062568.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 221033113031 its reverse (130311330122), we get a palindrome (351344443153).

The spelling of 221033113031 in words is "two hundred twenty-one billion, thirty-three million, one hundred thirteen thousand, thirty-one".