213312012331 has 4 divisors (see below), whose sum is σ = 232704013464. Its totient is φ = 193920011200.

The previous prime is 213312012301. The next prime is 213312012349. The reversal of 213312012331 is 133210213312.

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 213312012331 - 2³¹ = 211164528683 is a prime.

It is a super-2 number, since 2×213312012331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213312012301) 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, 9696000550 + ... + 9696000571.

It is an arithmetic number, because the mean of its divisors is an integer number (58176003366).

Almost surely, 2^213312012331 is an apocalyptic number.

213312012331 is a deficient number, since it is larger than the sum of its proper divisors (19392001133).

213312012331 is a wasteful number, since it uses less digits than its factorization.

213312012331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19392001132.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 213312012331 its reverse (133210213312), we get a palindrome (346522225643).

The spelling of 213312012331 in words is "two hundred thirteen billion, three hundred twelve million, twelve thousand, three hundred thirty-one".