131020121242 has 16 divisors (see below), whose sum is σ = 197214047712. Its totient is φ = 65282286960.

The previous prime is 131020121189. The next prime is 131020121251. The reversal of 131020121242 is 242121020131.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1440748 + ... + 1528984.

It is an arithmetic number, because the mean of its divisors is an integer number (12325877982).

Almost surely, 2^131020121242 is an apocalyptic number.

131020121242 is a deficient number, since it is larger than the sum of its proper divisors (66193926470).

131020121242 is a wasteful number, since it uses less digits than its factorization.

131020121242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90813.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 131020121242 its reverse (242121020131), we get a palindrome (373141141373).

The spelling of 131020121242 in words is "one hundred thirty-one billion, twenty million, one hundred twenty-one thousand, two hundred forty-two".