22278846121 has 9 divisors (see below), whose sum is σ = 25917424221. Its totient is φ = 19095258252.

The previous prime is 22278846101. The next prime is 22278846151. The reversal of 22278846121 is 12164887222.

The square root of 22278846121 is 149261.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 22278846121 - 2⁵ = 22278846089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22278846101) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1034166 + ... + 1055488.

Almost surely, 2^22278846121 is an apocalyptic number.

22278846121 is the 149261-st square number.

22278846121 is the 74631-st centered octagonal number.

It is an amenable number.

22278846121 is a deficient number, since it is larger than the sum of its proper divisors (3638578100).

22278846121 is an frugal number, since it uses more digits than its factorization.

22278846121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42660 (or 21330 counting only the distinct ones).

The product of its digits is 172032, while the sum is 43.

The spelling of 22278846121 in words is "twenty-two billion, two hundred seventy-eight million, eight hundred forty-six thousand, one hundred twenty-one".