123135440351 has 32 divisors (see below), whose sum is σ = 155022067200. Its totient is φ = 95011678080.

The previous prime is 123135440341. The next prime is 123135440353. The reversal of 123135440351 is 153044531321.

It is not a de Polignac number, because 123135440351 - 2¹⁰ = 123135439327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123135440353) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18284981 + ... + 18291713.

It is an arithmetic number, because the mean of its divisors is an integer number (4844439600).

Almost surely, 2^123135440351 is an apocalyptic number.

123135440351 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123135440351 is a deficient number, since it is larger than the sum of its proper divisors (31886626849).

123135440351 is a wasteful number, since it uses less digits than its factorization.

123135440351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9039.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 123135440351 its reverse (153044531321), we get a palindrome (276179971672).

The spelling of 123135440351 in words is "one hundred twenty-three billion, one hundred thirty-five million, four hundred forty thousand, three hundred fifty-one".