22302121 has 4 divisors (see below), whose sum is σ = 22374144. Its totient is φ = 22230100.

The previous prime is 22302109. The next prime is 22302139. The reversal of 22302121 is 12120322.

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 a de Polignac number, because none of the positive numbers 2^k-22302121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22302151) 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, 35545 + ... + 36166.

It is an arithmetic number, because the mean of its divisors is an integer number (5593536).

Almost surely, 2^22302121 is an apocalyptic number.

It is an amenable number.

22302121 is a deficient number, since it is larger than the sum of its proper divisors (72023).

22302121 is an equidigital number, since it uses as much as digits as its factorization.

22302121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72022.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 22302121 is about 4722.5121492697. The cubic root of 22302121 is about 281.4807649436.

Adding to 22302121 its reverse (12120322), we get a palindrome (34422443).

The spelling of 22302121 in words is "twenty-two million, three hundred two thousand, one hundred twenty-one".