231420984911 has 4 divisors (see below), whose sum is σ = 231986806800. Its totient is φ = 230855163024.

The previous prime is 231420984889. The next prime is 231420984923. The reversal of 231420984911 is 119489024132.

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-231420984911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231428984911) 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, 282910331 + ... + 282911148.

It is an arithmetic number, because the mean of its divisors is an integer number (57996701700).

Almost surely, 2^231420984911 is an apocalyptic number.

231420984911 is a deficient number, since it is larger than the sum of its proper divisors (565821889).

231420984911 is an equidigital number, since it uses as much as digits as its factorization.

231420984911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565821888.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 231420984911 in words is "two hundred thirty-one billion, four hundred twenty million, nine hundred eighty-four thousand, nine hundred eleven".