131021213 has 8 divisors (see below), whose sum is σ = 132192000. Its totient is φ = 129854608.

The previous prime is 131021167. The next prime is 131021239. The reversal of 131021213 is 312120131.

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

It is a cyclic number.

It is not a de Polignac number, because 131021213 - 2²⁰ = 129972637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131021273) 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, 106520 + ... + 107742.

It is an arithmetic number, because the mean of its divisors is an integer number (16524000).

Almost surely, 2^131021213 is an apocalyptic number.

It is an amenable number.

131021213 is a deficient number, since it is larger than the sum of its proper divisors (1170787).

131021213 is a wasteful number, since it uses less digits than its factorization.

131021213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2091.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 131021213 is about 11446.4497989551. The cubic root of 131021213 is about 507.9027199696.

Adding to 131021213 its reverse (312120131), we get a palindrome (443141344).

The spelling of 131021213 in words is "one hundred thirty-one million, twenty-one thousand, two hundred thirteen".