213321023656231 has 8 divisors (see below), whose sum is σ = 220443185399184. Its totient is φ = 206297098627200.

The previous prime is 213321023656189. The next prime is 213321023656327. The reversal of 213321023656231 is 132656320123312.

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 213321023656231 - 2¹¹ = 213321023654183 is a prime.

It is a super-2 number, since 2×213321023656231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213321023656031) 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, 24559174066 + ... + 24559182751.

It is an arithmetic number, because the mean of its divisors is an integer number (27555398174898).

Almost surely, 2^{213321023656231} is an apocalyptic number.

213321023656231 is a deficient number, since it is larger than the sum of its proper divisors (7122161742953).

213321023656231 is a wasteful number, since it uses less digits than its factorization.

213321023656231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49118356961.

The product of its (nonzero) digits is 233280, while the sum is 40.

Adding to 213321023656231 its reverse (132656320123312), we get a palindrome (345977343779543).

The spelling of 213321023656231 in words is "two hundred thirteen trillion, three hundred twenty-one billion, twenty-three million, six hundred fifty-six thousand, two hundred thirty-one".