123521133223 has 2 divisors, whose sum is σ = 123521133224. Its totient is φ = 123521133222.

The previous prime is 123521133193. The next prime is 123521133233. The reversal of 123521133223 is 322331125321.

It is a strong prime.

It is an emirp because it is prime and its reverse (322331125321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123521133223 - 2⁵ = 123521133191 is a prime.

It is a super-2 number, since 2×123521133223² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123521133191 and 123521133200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123521133233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61760566611 + 61760566612.

It is an arithmetic number, because the mean of its divisors is an integer number (61760566612).

Almost surely, 2^123521133223 is an apocalyptic number.

123521133223 is a deficient number, since it is larger than the sum of its proper divisors (1).

123521133223 is an equidigital number, since it uses as much as digits as its factorization.

123521133223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 28.

Adding to 123521133223 its reverse (322331125321), we get a palindrome (445852258544).

The spelling of 123521133223 in words is "one hundred twenty-three billion, five hundred twenty-one million, one hundred thirty-three thousand, two hundred twenty-three".