12011220157 has 2 divisors, whose sum is σ = 12011220158. Its totient is φ = 12011220156.

The previous prime is 12011220107. The next prime is 12011220161. The reversal of 12011220157 is 75102211021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10662421081 + 1348799076 = 103259^2 + 36726^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011220157 - 2¹⁵ = 12011187389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12011220107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005610078 + 6005610079.

It is an arithmetic number, because the mean of its divisors is an integer number (6005610079).

Almost surely, 2^12011220157 is an apocalyptic number.

It is an amenable number.

12011220157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011220157 is an equidigital number, since it uses as much as digits as its factorization.

12011220157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 22.

Adding to 12011220157 its reverse (75102211021), we get a palindrome (87113431178).

The spelling of 12011220157 in words is "twelve billion, eleven million, two hundred twenty thousand, one hundred fifty-seven".