135120250243 has 12 divisors (see below), whose sum is σ = 151974579064. Its totient is φ = 119979921600.

The previous prime is 135120250231. The next prime is 135120250249. The reversal of 135120250243 is 342052021531.

It is not a de Polignac number, because 135120250243 - 2⁹ = 135120249731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135120250249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12979638 + ... + 12990043.

Almost surely, 2^135120250243 is an apocalyptic number.

135120250243 is a deficient number, since it is larger than the sum of its proper divisors (16854328821).

135120250243 is a wasteful number, since it uses less digits than its factorization.

135120250243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25969746 (or 25969735 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 135120250243 its reverse (342052021531), we get a palindrome (477172271774).

The spelling of 135120250243 in words is "one hundred thirty-five billion, one hundred twenty million, two hundred fifty thousand, two hundred forty-three".