12190521137 has 2 divisors, whose sum is σ = 12190521138. Its totient is φ = 12190521136.

The previous prime is 12190521029. The next prime is 12190521173. The reversal of 12190521137 is 73112509121.

It is a happy number.

Together with next prime (12190521173) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8775755041 + 3414766096 = 93679^2 + 58436^2 .

It is a cyclic number.

It is not a de Polignac number, because 12190521137 - 2²⁴ = 12173743921 is a prime.

It is not a weakly prime, because it can be changed into another prime (12190571137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6095260568 + 6095260569.

It is an arithmetic number, because the mean of its divisors is an integer number (6095260569).

Almost surely, 2^12190521137 is an apocalyptic number.

It is an amenable number.

12190521137 is a deficient number, since it is larger than the sum of its proper divisors (1).

12190521137 is an equidigital number, since it uses as much as digits as its factorization.

12190521137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 32.

The spelling of 12190521137 in words is "twelve billion, one hundred ninety million, five hundred twenty-one thousand, one hundred thirty-seven".