213123322331 has 8 divisors (see below), whose sum is σ = 218751628800. Its totient is φ = 207540589608.

The previous prime is 213123322211. The next prime is 213123322351. The reversal of 213123322331 is 133223321312.

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 213123322331 - 2¹⁴ = 213123305947 is a prime.

It is a super-2 number, since 2×213123322331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213123322331.

It is not an unprimeable number, because it can be changed into a prime (213123322351) 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, 11383961 + ... + 11402666.

It is an arithmetic number, because the mean of its divisors is an integer number (27343953600).

Almost surely, 2^213123322331 is an apocalyptic number.

213123322331 is a deficient number, since it is larger than the sum of its proper divisors (5628306469).

213123322331 is a wasteful number, since it uses less digits than its factorization.

213123322331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22786873.

The product of its digits is 3888, while the sum is 26.

Adding to 213123322331 its reverse (133223321312), we get a palindrome (346346643643).

The spelling of 213123322331 in words is "two hundred thirteen billion, one hundred twenty-three million, three hundred twenty-two thousand, three hundred thirty-one".