123011310231133 has 4 divisors (see below), whose sum is σ = 123048575096668. Its totient is φ = 122974045365600.

The previous prime is 123011310231097. The next prime is 123011310231191. The reversal of 123011310231133 is 331132013110321.

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 58741233904089 + 64270076327044 = 7664283^2 + 8016862^2 .

It is a cyclic number.

It is not a de Polignac number, because 123011310231133 - 2²¹ = 123011308133981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123011310231098 and 123011310231107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123011310232133) 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, 18632427816 + ... + 18632434417.

It is an arithmetic number, because the mean of its divisors is an integer number (30762143774167).

Almost surely, 2^{123011310231133} is an apocalyptic number.

It is an amenable number.

123011310231133 is a deficient number, since it is larger than the sum of its proper divisors (37264865535).

123011310231133 is an equidigital number, since it uses as much as digits as its factorization.

123011310231133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37264865534.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 123011310231133 its reverse (331132013110321), we get a palindrome (454143323341454).

The spelling of 123011310231133 in words is "one hundred twenty-three trillion, eleven billion, three hundred ten million, two hundred thirty-one thousand, one hundred thirty-three".