231330220401 has 32 divisors (see below), whose sum is σ = 363714785280. Its totient is φ = 128042343936.

The previous prime is 231330220399. The next prime is 231330220427. The reversal of 231330220401 is 104022033132.

It is not a de Polignac number, because 231330220401 - 2¹ = 231330220399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (231330220441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1112391 + ... + 1303868.

It is an arithmetic number, because the mean of its divisors is an integer number (11366087040).

Almost surely, 2^231330220401 is an apocalyptic number.

231330220401 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

231330220401 is a deficient number, since it is larger than the sum of its proper divisors (132384564879).

231330220401 is a wasteful number, since it uses less digits than its factorization.

231330220401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2416413.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 231330220401 its reverse (104022033132), we get a palindrome (335352253533).

The spelling of 231330220401 in words is "two hundred thirty-one billion, three hundred thirty million, two hundred twenty thousand, four hundred one".