22661531121 has 4 divisors (see below), whose sum is σ = 30215374832. Its totient is φ = 15107687412.

The previous prime is 22661531117. The next prime is 22661531143. The reversal of 22661531121 is 12113516622.

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.

It is not a de Polignac number, because 22661531121 - 2² = 22661531117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22661511121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3776921851 + ... + 3776921856.

It is an arithmetic number, because the mean of its divisors is an integer number (7553843708).

Almost surely, 2^22661531121 is an apocalyptic number.

It is an amenable number.

22661531121 is a deficient number, since it is larger than the sum of its proper divisors (7553843711).

22661531121 is an equidigital number, since it uses as much as digits as its factorization.

22661531121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7553843710.

The product of its digits is 4320, while the sum is 30.

The spelling of 22661531121 in words is "twenty-two billion, six hundred sixty-one million, five hundred thirty-one thousand, one hundred twenty-one".