22011512125 has 8 divisors (see below), whose sum is σ = 27470367288. Its totient is φ = 17609209600.

The previous prime is 22011512123. The next prime is 22011512147. The reversal of 22011512125 is 52121511022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 313927524 + 21697584601 = 17718^2 + 147301^2 .

It is not a de Polignac number, because 22011512125 - 2¹ = 22011512123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22011512096 and 22011512105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011512123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88045924 + ... + 88046173.

It is an arithmetic number, because the mean of its divisors is an integer number (3433795911).

Almost surely, 2^22011512125 is an apocalyptic number.

22011512125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22011512125 is a deficient number, since it is larger than the sum of its proper divisors (5458855163).

22011512125 is an equidigital number, since it uses as much as digits as its factorization.

22011512125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176092112 (or 176092102 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

The spelling of 22011512125 in words is "twenty-two billion, eleven million, five hundred twelve thousand, one hundred twenty-five".