22913121 has 16 divisors (see below), whose sum is σ = 38089728. Its totient is φ = 11902800.

The previous prime is 22913057. The next prime is 22913131. The reversal of 22913121 is 12131922.

It is not a de Polignac number, because 22913121 - 2⁶ = 22913057 is a prime.

It is a super-2 number, since 2×22913121² = 1050022227921282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (22913131) 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 15 ways as a sum of consecutive naturals, for example, 49365 + ... + 49826.

It is an arithmetic number, because the mean of its divisors is an integer number (2380608).

Almost surely, 2^22913121 is an apocalyptic number.

22913121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22913121 is a deficient number, since it is larger than the sum of its proper divisors (15176607).

22913121 is a wasteful number, since it uses less digits than its factorization.

22913121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99212.

The product of its digits is 216, while the sum is 21.

The square root of 22913121 is about 4786.7651916508. The cubic root of 22913121 is about 284.0281703525.

The spelling of 22913121 in words is "twenty-two million, nine hundred thirteen thousand, one hundred twenty-one".