213313122331 has 4 divisors (see below), whose sum is σ = 213320281464. Its totient is φ = 213305963200.

The previous prime is 213313122301. The next prime is 213313122389. The reversal of 213313122331 is 133221313312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213313122331 - 2⁵ = 213313122299 is a prime.

It is a super-2 number, since 2×213313122331² (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 = 213313122296 and 213313122305.

It is not an unprimeable number, because it can be changed into a prime (213313122301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3534685 + ... + 3594526.

It is an arithmetic number, because the mean of its divisors is an integer number (53330070366).

Almost surely, 2^213313122331 is an apocalyptic number.

213313122331 is a deficient number, since it is larger than the sum of its proper divisors (7159133).

213313122331 is an equidigital number, since it uses as much as digits as its factorization.

213313122331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7159132.

The product of its digits is 1944, while the sum is 25.

Adding to 213313122331 its reverse (133221313312), we get a palindrome (346534435643).

The spelling of 213313122331 in words is "two hundred thirteen billion, three hundred thirteen million, one hundred twenty-two thousand, three hundred thirty-one".