12252021157 has 2 divisors, whose sum is σ = 12252021158. Its totient is φ = 12252021156.

The previous prime is 12252021109. The next prime is 12252021167. The reversal of 12252021157 is 75112025221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12226609476 + 25411681 = 110574^2 + 5041^2 .

It is a cyclic number.

It is not a de Polignac number, because 12252021157 - 2⁷ = 12252021029 is a prime.

It is a super-2 number, since 2×12252021157² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12252021167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6126010578 + 6126010579.

It is an arithmetic number, because the mean of its divisors is an integer number (6126010579).

Almost surely, 2^12252021157 is an apocalyptic number.

It is an amenable number.

12252021157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12252021157 is an equidigital number, since it uses as much as digits as its factorization.

12252021157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 28.

Adding to 12252021157 its reverse (75112025221), we get a palindrome (87364046378).

The spelling of 12252021157 in words is "twelve billion, two hundred fifty-two million, twenty-one thousand, one hundred fifty-seven".