213212131321 has 8 divisors (see below), whose sum is σ = 245223053120. Its totient is φ = 181589221008.

The previous prime is 213212131313. The next prime is 213212131331. The reversal of 213212131321 is 123131212312.

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 213212131321 - 2³ = 213212131313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213212131292 and 213212131301.

It is not an unprimeable number, because it can be changed into a prime (213212131331) 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, 97001691 + ... + 97003888.

It is an arithmetic number, because the mean of its divisors is an integer number (30652881640).

Almost surely, 2^213212131321 is an apocalyptic number.

It is an amenable number.

213212131321 is a deficient number, since it is larger than the sum of its proper divisors (32010921799).

213212131321 is a wasteful number, since it uses less digits than its factorization.

213212131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194005743.

The product of its digits is 432, while the sum is 22.

Adding to 213212131321 its reverse (123131212312), we get a palindrome (336343343633).

The spelling of 213212131321 in words is "two hundred thirteen billion, two hundred twelve million, one hundred thirty-one thousand, three hundred twenty-one".