11001232133231 has 4 divisors (see below), whose sum is σ = 11001491583600. Its totient is φ = 11000972682864.

The previous prime is 11001232133197. The next prime is 11001232133239. The reversal of 11001232133231 is 13233123210011.

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-11001232133231 is a prime.

It is a super-2 number, since 2×11001232133231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11001232133197 and 11001232133206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001232133239) 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, 129661571 + ... + 129746388.

It is an arithmetic number, because the mean of its divisors is an integer number (2750372895900).

Almost surely, 2^{11001232133231} is an apocalyptic number.

11001232133231 is a deficient number, since it is larger than the sum of its proper divisors (259450369).

11001232133231 is an equidigital number, since it uses as much as digits as its factorization.

11001232133231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259450368.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 11001232133231 its reverse (13233123210011), we get a palindrome (24234355343242).

The spelling of 11001232133231 in words is "eleven trillion, one billion, two hundred thirty-two million, one hundred thirty-three thousand, two hundred thirty-one".