221202111023 has 4 divisors (see below), whose sum is σ = 222890676888. Its totient is φ = 219513545160.

The previous prime is 221202111019. The next prime is 221202111041. The reversal of 221202111023 is 320111202122.

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 221202111023 - 2² = 221202111019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221202110992 and 221202111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221202111073) 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, 844282736 + ... + 844282997.

It is an arithmetic number, because the mean of its divisors is an integer number (55722669222).

Almost surely, 2^221202111023 is an apocalyptic number.

221202111023 is a deficient number, since it is larger than the sum of its proper divisors (1688565865).

221202111023 is a wasteful number, since it uses less digits than its factorization.

221202111023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688565864.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221202111023 its reverse (320111202122), we get a palindrome (541313313145).

The spelling of 221202111023 in words is "two hundred twenty-one billion, two hundred two million, one hundred eleven thousand, twenty-three".