131261023242 has 24 divisors (see below), whose sum is σ = 285674223744. Its totient is φ = 43557468264.

The previous prime is 131261023171. The next prime is 131261023247. The reversal of 131261023242 is 242320162131.

131261023242 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 610 + 2 + 3 + 2 + 42 = 666.

It is not an unprimeable number, because it can be changed into a prime (131261023247) 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, 16346388 + ... + 16354415.

It is an arithmetic number, because the mean of its divisors is an integer number (11903092656).

Almost surely, 2^131261023242 is an apocalyptic number.

131261023242 is an abundant number, since it is smaller than the sum of its proper divisors (154413200502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131261023242 is a wasteful number, since it uses less digits than its factorization.

131261023242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32701034 (or 32701031 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 131261023242 its reverse (242320162131), we get a palindrome (373581185373).

The spelling of 131261023242 in words is "one hundred thirty-one billion, two hundred sixty-one million, twenty-three thousand, two hundred forty-two".