22919121 has 6 divisors (see below), whose sum is σ = 33105410. Its totient is φ = 15279408.

The previous prime is 22919119. The next prime is 22919147. The reversal of 22919121 is 12191922.

22919121 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in only one way, i.e., 22043025 + 876096 = 4695^2 + 936^2 .

It is not a de Polignac number, because 22919121 - 2¹ = 22919119 is a prime.

It is a super-2 number, since 2×22919121² = 1050572214825282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22919101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1273276 + ... + 1273293.

Almost surely, 2^22919121 is an apocalyptic number.

It is an amenable number.

22919121 is a deficient number, since it is larger than the sum of its proper divisors (10186289).

22919121 is a wasteful number, since it uses less digits than its factorization.

22919121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2546575 (or 2546572 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 22919121 is about 4787.3918786747. The cubic root of 22919121 is about 284.0529599377.

The spelling of 22919121 in words is "twenty-two million, nine hundred nineteen thousand, one hundred twenty-one".