131002213121 has 8 divisors (see below), whose sum is σ = 141085983360. Its totient is φ = 120919396752.

The previous prime is 131002213109. The next prime is 131002213127. The reversal of 131002213121 is 121312200131.

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-131002213121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131002213121.

It is not an unprimeable number, because it can be changed into a prime (131002213127) 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, 60686 + ... + 515448.

It is an arithmetic number, because the mean of its divisors is an integer number (17635747920).

Almost surely, 2^131002213121 is an apocalyptic number.

It is an amenable number.

131002213121 is a deficient number, since it is larger than the sum of its proper divisors (10083770239).

131002213121 is a wasteful number, since it uses less digits than its factorization.

131002213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476935.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 131002213121 its reverse (121312200131), we get a palindrome (252314413252).

The spelling of 131002213121 in words is "one hundred thirty-one billion, two million, two hundred thirteen thousand, one hundred twenty-one".