210323021231 has 4 divisors (see below), whose sum is σ = 210329869464. Its totient is φ = 210316173000.

The previous prime is 210323021219. The next prime is 210323021261. The reversal of 210323021231 is 132120323012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210323021231 is a prime.

It is a super-2 number, since 2×210323021231² (a number of 23 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 (210323021261) 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, 3377840 + ... + 3439541.

It is an arithmetic number, because the mean of its divisors is an integer number (52582467366).

Almost surely, 2^210323021231 is an apocalyptic number.

210323021231 is a deficient number, since it is larger than the sum of its proper divisors (6848233).

210323021231 is an equidigital number, since it uses as much as digits as its factorization.

210323021231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6848232.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 210323021231 its reverse (132120323012), we get a palindrome (342443344243).

The spelling of 210323021231 in words is "two hundred ten billion, three hundred twenty-three million, twenty-one thousand, two hundred thirty-one".