213231320321 has 8 divisors (see below), whose sum is σ = 220589352000. Its totient is φ = 205873637200.

The previous prime is 213231320317. The next prime is 213231320339. The reversal of 213231320321 is 123023132312.

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 213231320321 - 2² = 213231320317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213231320371) 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, 2027996 + ... + 2130546.

It is an arithmetic number, because the mean of its divisors is an integer number (27573669000).

Almost surely, 2^213231320321 is an apocalyptic number.

It is an amenable number.

213231320321 is a deficient number, since it is larger than the sum of its proper divisors (7358031679).

213231320321 is a wasteful number, since it uses less digits than its factorization.

213231320321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174279.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 213231320321 its reverse (123023132312), we get a palindrome (336254452633).

The spelling of 213231320321 in words is "two hundred thirteen billion, two hundred thirty-one million, three hundred twenty thousand, three hundred twenty-one".