131121154235242 has 16 divisors (see below), whose sum is σ = 196699900304160. Its totient is φ = 65554521085872.

The previous prime is 131121154235177. The next prime is 131121154235249. The reversal of 131121154235242 is 242532451121131.

It is not an unprimeable number, because it can be changed into a prime (131121154235249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2004295609 + ... + 2004361027.

It is an arithmetic number, because the mean of its divisors is an integer number (12293743769010).

Almost surely, 2^{131121154235242} is an apocalyptic number.

131121154235242 is a deficient number, since it is larger than the sum of its proper divisors (65578746068918).

131121154235242 is a wasteful number, since it uses less digits than its factorization.

131121154235242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142677.

The product of its digits is 57600, while the sum is 37.

The spelling of 131121154235242 in words is "one hundred thirty-one trillion, one hundred twenty-one billion, one hundred fifty-four million, two hundred thirty-five thousand, two hundred forty-two".