12155022157 has 2 divisors, whose sum is σ = 12155022158. Its totient is φ = 12155022156.

The previous prime is 12155022149. The next prime is 12155022197. The reversal of 12155022157 is 75122055121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11813733481 + 341288676 = 108691^2 + 18474^2 .

It is a cyclic number.

It is not a de Polignac number, because 12155022157 - 2³ = 12155022149 is a prime.

It is a super-3 number, since 3×12155022157³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12155022127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6077511078 + 6077511079.

It is an arithmetic number, because the mean of its divisors is an integer number (6077511079).

Almost surely, 2^12155022157 is an apocalyptic number.

It is an amenable number.

12155022157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12155022157 is an equidigital number, since it uses as much as digits as its factorization.

12155022157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7000, while the sum is 31.

Adding to 12155022157 its reverse (75122055121), we get a palindrome (87277077278).

The spelling of 12155022157 in words is "twelve billion, one hundred fifty-five million, twenty-two thousand, one hundred fifty-seven".