231220333022011 has 4 divisors (see below), whose sum is σ = 232179753491224. Its totient is φ = 230260912552800.

The previous prime is 231220333022009. The next prime is 231220333022033. The reversal of 231220333022011 is 110220333022132.

231220333022011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231220333022011 - 2¹ = 231220333022009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231220333022111) 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, 479710234245 + ... + 479710234726.

It is an arithmetic number, because the mean of its divisors is an integer number (58044938372806).

Almost surely, 2^{231220333022011} is an apocalyptic number.

231220333022011 is a deficient number, since it is larger than the sum of its proper divisors (959420469213).

231220333022011 is an equidigital number, since it uses as much as digits as its factorization.

231220333022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959420469212.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 231220333022011 its reverse (110220333022132), we get a palindrome (341440666044143).

The spelling of 231220333022011 in words is "two hundred thirty-one trillion, two hundred twenty billion, three hundred thirty-three million, twenty-two thousand, eleven".