231101201233 has 4 divisors (see below), whose sum is σ = 264115658560. Its totient is φ = 198086743908.

The previous prime is 231101201197. The next prime is 231101201251. The reversal of 231101201233 is 332102101132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231101201233 is a prime.

It is a super-2 number, since 2×231101201233² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231101201233.

It is not an unprimeable number, because it can be changed into a prime (231101201273) 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, 16507228653 + ... + 16507228666.

It is an arithmetic number, because the mean of its divisors is an integer number (66028914640).

Almost surely, 2^231101201233 is an apocalyptic number.

It is an amenable number.

231101201233 is a deficient number, since it is larger than the sum of its proper divisors (33014457327).

231101201233 is an equidigital number, since it uses as much as digits as its factorization.

231101201233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33014457326.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 231101201233 its reverse (332102101132), we get a palindrome (563203302365).

The spelling of 231101201233 in words is "two hundred thirty-one billion, one hundred one million, two hundred one thousand, two hundred thirty-three".