123113205523 has 16 divisors (see below), whose sum is σ = 153502246656. Its totient is φ = 95925831840.

The previous prime is 123113205517. The next prime is 123113205571. The reversal of 123113205523 is 325502311321.

It is a cyclic number.

It is not a de Polignac number, because 123113205523 - 2¹³ = 123113197331 is a prime.

It is a super-2 number, since 2×123113205523² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123113205491 and 123113205500.

It is not an unprimeable number, because it can be changed into a prime (123113205503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1300465 + ... + 1391917.

It is an arithmetic number, because the mean of its divisors is an integer number (9593890416).

Almost surely, 2^123113205523 is an apocalyptic number.

123113205523 is a deficient number, since it is larger than the sum of its proper divisors (30389041133).

123113205523 is a wasteful number, since it uses less digits than its factorization.

123113205523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108954.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 123113205523 its reverse (325502311321), we get a palindrome (448615516844).

The spelling of 123113205523 in words is "one hundred twenty-three billion, one hundred thirteen million, two hundred five thousand, five hundred twenty-three".