321213102131 has 16 divisors (see below), whose sum is σ = 326195877600. Its totient is φ = 316263053568.

The previous prime is 321213102107. The next prime is 321213102151. The reversal of 321213102131 is 131201312123.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 321213102131 - 2³⁴ = 304033232947 is a prime.

It is a super-2 number, since 2×321213102131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321213102151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28743461 + ... + 28754633.

It is an arithmetic number, because the mean of its divisors is an integer number (20387242350).

Almost surely, 2^321213102131 is an apocalyptic number.

321213102131 is a deficient number, since it is larger than the sum of its proper divisors (4982775469).

321213102131 is a wasteful number, since it uses less digits than its factorization.

321213102131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12598.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 321213102131 its reverse (131201312123), we get a palindrome (452414414254).

The spelling of 321213102131 in words is "three hundred twenty-one billion, two hundred thirteen million, one hundred two thousand, one hundred thirty-one".