231030202221 has 96 divisors (see below), whose sum is σ = 421060872960. Its totient is φ = 118798617600.

The previous prime is 231030202219. The next prime is 231030202261. The reversal of 231030202221 is 122202030132.

It is not a de Polignac number, because 231030202221 - 2¹ = 231030202219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231030202194 and 231030202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231030202211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 78606970 + ... + 78609908.

It is an arithmetic number, because the mean of its divisors is an integer number (4386050760).

Almost surely, 2^231030202221 is an apocalyptic number.

231030202221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

231030202221 is a deficient number, since it is larger than the sum of its proper divisors (190030670739).

231030202221 is a wasteful number, since it uses less digits than its factorization.

231030202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5347 (or 5344 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 231030202221 its reverse (122202030132), we get a palindrome (353232232353).

The spelling of 231030202221 in words is "two hundred thirty-one billion, thirty million, two hundred two thousand, two hundred twenty-one".