12111001457 has 2 divisors, whose sum is σ = 12111001458. Its totient is φ = 12111001456.

The previous prime is 12111001447. The next prime is 12111001493. The reversal of 12111001457 is 75410011121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11571089761 + 539911696 = 107569^2 + 23236^2 .

It is an emirp because it is prime and its reverse (75410011121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12111001457 - 2⁶ = 12111001393 is a prime.

It is a super-2 number, since 2×12111001457² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12111001447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055500728 + 6055500729.

It is an arithmetic number, because the mean of its divisors is an integer number (6055500729).

Almost surely, 2^12111001457 is an apocalyptic number.

It is an amenable number.

12111001457 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111001457 is an equidigital number, since it uses as much as digits as its factorization.

12111001457 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 23.

Adding to 12111001457 its reverse (75410011121), we get a palindrome (87521012578).

The spelling of 12111001457 in words is "twelve billion, one hundred eleven million, one thousand, four hundred fifty-seven".