131065235021 has 8 divisors (see below), whose sum is σ = 149799343680. Its totient is φ = 112333752288.

The previous prime is 131065234991. The next prime is 131065235023. The reversal of 131065235021 is 120532560131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131065235021 is a prime.

It is a super-2 number, since 2×131065235021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131065235023) 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, 548336 + ... + 750201.

It is an arithmetic number, because the mean of its divisors is an integer number (18724917960).

Almost surely, 2^131065235021 is an apocalyptic number.

It is an amenable number.

131065235021 is a deficient number, since it is larger than the sum of its proper divisors (18734108659).

131065235021 is a wasteful number, since it uses less digits than its factorization.

131065235021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312963.

The product of its (nonzero) digits is 5400, while the sum is 29.

Adding to 131065235021 its reverse (120532560131), we get a palindrome (251597795152).

The spelling of 131065235021 in words is "one hundred thirty-one billion, sixty-five million, two hundred thirty-five thousand, twenty-one".