22122321 has 32 divisors (see below), whose sum is σ = 34247808. Its totient is φ = 12579840.

The previous prime is 22122311. The next prime is 22122341. The reversal of 22122321 is 12322122.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-22122321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22122321.

It is not an unprimeable number, because it can be changed into a prime (22122311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40170 + ... + 40716.

It is an arithmetic number, because the mean of its divisors is an integer number (1070244).

Almost surely, 2^22122321 is an apocalyptic number.

It is an amenable number.

22122321 is a deficient number, since it is larger than the sum of its proper divisors (12125487).

22122321 is a wasteful number, since it uses less digits than its factorization.

22122321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641.

The product of its digits is 96, while the sum is 15.

The square root of 22122321 is about 4703.4371474487. The cubic root of 22122321 is about 280.7222890897.

Adding to 22122321 its reverse (12322122), we get a palindrome (34444443).

The spelling of 22122321 in words is "twenty-two million, one hundred twenty-two thousand, three hundred twenty-one".