22255121 has 4 divisors (see below), whose sum is σ = 25434432. Its totient is φ = 19075812.

The previous prime is 22255109. The next prime is 22255127. The reversal of 22255121 is 12155222.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12155222 = 2 ⋅6077611.

It is not a de Polignac number, because 22255121 - 2¹⁰ = 22254097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22255093 and 22255102.

It is not an unprimeable number, because it can be changed into a prime (22255127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1589645 + ... + 1589658.

It is an arithmetic number, because the mean of its divisors is an integer number (6358608).

Almost surely, 2^22255121 is an apocalyptic number.

It is an amenable number.

22255121 is a deficient number, since it is larger than the sum of its proper divisors (3179311).

22255121 is an equidigital number, since it uses as much as digits as its factorization.

22255121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3179310.

The product of its digits is 400, while the sum is 20.

The square root of 22255121 is about 4717.5333597125. The cubic root of 22255121 is about 281.2828928772.

The spelling of 22255121 in words is "twenty-two million, two hundred fifty-five thousand, one hundred twenty-one".