22121120169 has 20 divisors (see below), whose sum is σ = 33053380756. Its totient is φ = 14743731456.

The previous prime is 22121120167. The next prime is 22121120207. The reversal of 22121120169 is 96102112122.

It can be written as a sum of positive squares in 2 ways, for example, as 9261560169 + 12859560000 = 96237^2 + 113400^2 .

It is not a de Polignac number, because 22121120169 - 2¹ = 22121120167 is a prime.

It is a super-2 number, since 2×22121120169² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121120167) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 314157 + ... + 378069.

Almost surely, 2^22121120169 is an apocalyptic number.

It is an amenable number.

22121120169 is a deficient number, since it is larger than the sum of its proper divisors (10932260587).

22121120169 is an equidigital number, since it uses as much as digits as its factorization.

22121120169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68198 (or 68189 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The spelling of 22121120169 in words is "twenty-two billion, one hundred twenty-one million, one hundred twenty thousand, one hundred sixty-nine".