123311355145 has 16 divisors (see below), whose sum is σ = 161481589632. Its totient is φ = 89649976960.

The previous prime is 123311355143. The next prime is 123311355157. The reversal of 123311355145 is 541553113321.

It is not a de Polignac number, because 123311355145 - 2¹ = 123311355143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123311355145.

It is not an unprimeable number, because it can be changed into a prime (123311355143) 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, 226492 + ... + 545821.

It is an arithmetic number, because the mean of its divisors is an integer number (10092599352).

Almost surely, 2^123311355145 is an apocalyptic number.

It is an amenable number.

123311355145 is a deficient number, since it is larger than the sum of its proper divisors (38170234487).

123311355145 is a wasteful number, since it uses less digits than its factorization.

123311355145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775232.

The product of its digits is 27000, while the sum is 34.

Adding to 123311355145 its reverse (541553113321), we get a palindrome (664864468466).

The spelling of 123311355145 in words is "one hundred twenty-three billion, three hundred eleven million, three hundred fifty-five thousand, one hundred forty-five".