231220301210231 has 4 divisors (see below), whose sum is σ = 231221138189352. Its totient is φ = 231219464231112.

The previous prime is 231220301210147. The next prime is 231220301210281. The reversal of 231220301210231 is 132012103022132.

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-231220301210231 is a prime.

It is a super-2 number, since 2×231220301210231² (a number of 30 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 = 231220301210197 and 231220301210206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231220301210281) 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, 418075040 + ... + 418627733.

It is an arithmetic number, because the mean of its divisors is an integer number (57805284547338).

Almost surely, 2^{231220301210231} is an apocalyptic number.

231220301210231 is a deficient number, since it is larger than the sum of its proper divisors (836979121).

231220301210231 is an equidigital number, since it uses as much as digits as its factorization.

231220301210231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836979120.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 231220301210231 its reverse (132012103022132), we get a palindrome (363232404232363).

The spelling of 231220301210231 in words is "two hundred thirty-one trillion, two hundred twenty billion, three hundred one million, two hundred ten thousand, two hundred thirty-one".