22861121 has 4 divisors (see below), whose sum is σ = 22882500. Its totient is φ = 22839744.

The previous prime is 22861093. The next prime is 22861147. The reversal of 22861121 is 12116822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4060225 + 18800896 = 2015^2 + 4336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22861121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22861171) 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, 8996 + ... + 11253.

It is an arithmetic number, because the mean of its divisors is an integer number (5720625).

Almost surely, 2^22861121 is an apocalyptic number.

It is an amenable number.

22861121 is a deficient number, since it is larger than the sum of its proper divisors (21379).

22861121 is a wasteful number, since it uses less digits than its factorization.

22861121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21378.

The product of its digits is 384, while the sum is 23.

The square root of 22861121 is about 4781.3304633752. The cubic root of 22861121 is about 283.8131457853.

Adding to 22861121 its reverse (12116822), we get a palindrome (34977943).

The spelling of 22861121 in words is "twenty-two million, eight hundred sixty-one thousand, one hundred twenty-one".