12011101957 has 2 divisors, whose sum is σ = 12011101958. Its totient is φ = 12011101956.

The previous prime is 12011101943. The next prime is 12011101969. The reversal of 12011101957 is 75910111021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11831783076 + 179318881 = 108774^2 + 13391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12011101957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12011101057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005550978 + 6005550979.

It is an arithmetic number, because the mean of its divisors is an integer number (6005550979).

Almost surely, 2^12011101957 is an apocalyptic number.

It is an amenable number.

12011101957 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011101957 is an equidigital number, since it uses as much as digits as its factorization.

12011101957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 28.

Adding to 12011101957 its reverse (75910111021), we get a palindrome (87921212978).

The spelling of 12011101957 in words is "twelve billion, eleven million, one hundred one thousand, nine hundred fifty-seven".