231002210221 has 4 divisors (see below), whose sum is σ = 235917150912. Its totient is φ = 226087269532.

The previous prime is 231002210213. The next prime is 231002210237. The reversal of 231002210221 is 122012200132.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231002210221 - 2³ = 231002210213 is a prime.

It is a super-2 number, since 2×231002210221² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231002210195 and 231002210204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231002210821) 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, 2457470275 + ... + 2457470368.

It is an arithmetic number, because the mean of its divisors is an integer number (58979287728).

Almost surely, 2^231002210221 is an apocalyptic number.

It is an amenable number.

231002210221 is a deficient number, since it is larger than the sum of its proper divisors (4914940691).

231002210221 is an equidigital number, since it uses as much as digits as its factorization.

231002210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4914940690.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 231002210221 its reverse (122012200132), we get a palindrome (353014410353).

The spelling of 231002210221 in words is "two hundred thirty-one billion, two million, two hundred ten thousand, two hundred twenty-one".