213121332131 has 8 divisors (see below), whose sum is σ = 214385036880. Its totient is φ = 211860523872.

The previous prime is 213121332091. The next prime is 213121332181. The reversal of 213121332131 is 131233121312.

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-213121332131 is a prime.

It is a super-2 number, since 2×213121332131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213121332097 and 213121332106.

It is not an unprimeable number, because it can be changed into a prime (213121332181) 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, 576440 + ... + 870933.

It is an arithmetic number, because the mean of its divisors is an integer number (26798129610).

Almost surely, 2^213121332131 is an apocalyptic number.

213121332131 is a deficient number, since it is larger than the sum of its proper divisors (1263704749).

213121332131 is a wasteful number, since it uses less digits than its factorization.

213121332131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448245.

The product of its digits is 648, while the sum is 23.

Adding to 213121332131 its reverse (131233121312), we get a palindrome (344354453443).

The spelling of 213121332131 in words is "two hundred thirteen billion, one hundred twenty-one million, three hundred thirty-two thousand, one hundred thirty-one".