133123001221231 has 4 divisors (see below), whose sum is σ = 152140572824272. Its totient is φ = 114105429618192.

The previous prime is 133123001221201. The next prime is 133123001221237. The reversal of 133123001221231 is 132122100321331.

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-133123001221231 is a prime.

It is a super-2 number, since 2×133123001221231² (a number of 29 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 = 133123001221196 and 133123001221205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133123001221237) 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, 9508785801510 + ... + 9508785801523.

It is an arithmetic number, because the mean of its divisors is an integer number (38035143206068).

Almost surely, 2^{133123001221231} is an apocalyptic number.

133123001221231 is a deficient number, since it is larger than the sum of its proper divisors (19017571603041).

133123001221231 is an equidigital number, since it uses as much as digits as its factorization.

133123001221231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19017571603040.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 133123001221231 its reverse (132122100321331), we get a palindrome (265245101542562).

The spelling of 133123001221231 in words is "one hundred thirty-three trillion, one hundred twenty-three billion, one million, two hundred twenty-one thousand, two hundred thirty-one".