23220331111221 has 4 divisors (see below), whose sum is σ = 30960441481632. Its totient is φ = 15480220740812.

The previous prime is 23220331111157. The next prime is 23220331111253. The reversal of 23220331111221 is 12211113302232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23220331111221 - 2⁶ = 23220331111157 is a prime.

It is a super-2 number, since 2×23220331111221² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23220331111191 and 23220331111200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23220331151221) 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, 3870055185201 + ... + 3870055185206.

It is an arithmetic number, because the mean of its divisors is an integer number (7740110370408).

Almost surely, 2^{23220331111221} is an apocalyptic number.

It is an amenable number.

23220331111221 is a deficient number, since it is larger than the sum of its proper divisors (7740110370411).

23220331111221 is an equidigital number, since it uses as much as digits as its factorization.

23220331111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7740110370410.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 23220331111221 its reverse (12211113302232), we get a palindrome (35431444413453).

The spelling of 23220331111221 in words is "twenty-three trillion, two hundred twenty billion, three hundred thirty-one million, one hundred eleven thousand, two hundred twenty-one".