231101222101 has 4 divisors (see below), whose sum is σ = 235461622572. Its totient is φ = 226740821632.

The previous prime is 231101222087. The next prime is 231101222117. The reversal of 231101222101 is 101222101132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 153232319601 + 77868902500 = 391449^2 + 279050^2 .

It is a cyclic number.

It is not a de Polignac number, because 231101222101 - 2⁵ = 231101222069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231101222501) 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, 2180200156 + ... + 2180200261.

It is an arithmetic number, because the mean of its divisors is an integer number (58865405643).

Almost surely, 2^231101222101 is an apocalyptic number.

It is an amenable number.

231101222101 is a deficient number, since it is larger than the sum of its proper divisors (4360400471).

231101222101 is an equidigital number, since it uses as much as digits as its factorization.

231101222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4360400470.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 231101222101 its reverse (101222101132), we get a palindrome (332323323233).

The spelling of 231101222101 in words is "two hundred thirty-one billion, one hundred one million, two hundred twenty-two thousand, one hundred one".