22233121 has 2 divisors, whose sum is σ = 22233122. Its totient is φ = 22233120.

The previous prime is 22233109. The next prime is 22233139. The reversal of 22233121 is 12133222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22043025 + 190096 = 4695^2 + 436^2 .

It is a cyclic number.

It is not a de Polignac number, because 22233121 - 2⁷ = 22232993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22233095 and 22233104.

It is not a weakly prime, because it can be changed into another prime (22233181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11116560 + 11116561.

It is an arithmetic number, because the mean of its divisors is an integer number (11116561).

Almost surely, 2^22233121 is an apocalyptic number.

It is an amenable number.

22233121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22233121 is an equidigital number, since it uses as much as digits as its factorization.

22233121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 16.

The square root of 22233121 is about 4715.2010561587. The cubic root of 22233121 is about 281.1901761813.

Adding to 22233121 its reverse (12133222), we get a palindrome (34366343).

The spelling of 22233121 in words is "twenty-two million, two hundred thirty-three thousand, one hundred twenty-one".