135251120491 has 2 divisors, whose sum is σ = 135251120492. Its totient is φ = 135251120490.

The previous prime is 135251120453. The next prime is 135251120519. The reversal of 135251120491 is 194021152531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135251120491 - 2⁷ = 135251120363 is a prime.

It is not a weakly prime, because it can be changed into another prime (135251127491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67625560245 + 67625560246.

It is an arithmetic number, because the mean of its divisors is an integer number (67625560246).

Almost surely, 2^135251120491 is an apocalyptic number.

135251120491 is a deficient number, since it is larger than the sum of its proper divisors (1).

135251120491 is an equidigital number, since it uses as much as digits as its factorization.

135251120491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 34.

The spelling of 135251120491 in words is "one hundred thirty-five billion, two hundred fifty-one million, one hundred twenty thousand, four hundred ninety-one".