12112011001957 has 2 divisors, whose sum is σ = 12112011001958. Its totient is φ = 12112011001956.

The previous prime is 12112011001943. The next prime is 12112011001973. The reversal of 12112011001957 is 75910011021121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10431549903681 + 1680461098276 = 3229791^2 + 1296326^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12112011001957 is a prime.

It is a super-2 number, since 2×12112011001957² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12112011001907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056005500978 + 6056005500979.

It is an arithmetic number, because the mean of its divisors is an integer number (6056005500979).

Almost surely, 2^{12112011001957} is an apocalyptic number.

It is an amenable number.

12112011001957 is a deficient number, since it is larger than the sum of its proper divisors (1).

12112011001957 is an equidigital number, since it uses as much as digits as its factorization.

12112011001957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 31.

The spelling of 12112011001957 in words is "twelve trillion, one hundred twelve billion, eleven million, one thousand, nine hundred fifty-seven".