12157222529 has 4 divisors (see below), whose sum is σ = 12872353284. Its totient is φ = 11442091776.

The previous prime is 12157222507. The next prime is 12157222541. The reversal of 12157222529 is 92522275121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92522275121 = 101837 ⋅908533.

It can be written as a sum of positive squares in 2 ways, for example, as 5292271504 + 6864951025 = 72748^2 + 82855^2 .

It is a cyclic number.

It is not a de Polignac number, because 12157222529 - 2²⁴ = 12140445313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12157222492 and 12157222501.

It is not an unprimeable number, because it can be changed into a prime (12157222579) 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, 357565352 + ... + 357565385.

It is an arithmetic number, because the mean of its divisors is an integer number (3218088321).

Almost surely, 2^12157222529 is an apocalyptic number.

It is an amenable number.

12157222529 is a deficient number, since it is larger than the sum of its proper divisors (715130755).

12157222529 is an equidigital number, since it uses as much as digits as its factorization.

12157222529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715130754.

The product of its digits is 50400, while the sum is 38.

The spelling of 12157222529 in words is "twelve billion, one hundred fifty-seven million, two hundred twenty-two thousand, five hundred twenty-nine".