123154543311 has 16 divisors (see below), whose sum is σ = 172862112000. Its totient is φ = 77775683328.

The previous prime is 123154543307. The next prime is 123154543331. The reversal of 123154543311 is 113345451321.

It is not a de Polignac number, because 123154543311 - 2² = 123154543307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123154543331) 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, 708255 + ... + 864831.

It is an arithmetic number, because the mean of its divisors is an integer number (10803882000).

Almost surely, 2^123154543311 is an apocalyptic number.

123154543311 is a deficient number, since it is larger than the sum of its proper divisors (49707568689).

123154543311 is a wasteful number, since it uses less digits than its factorization.

123154543311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170398.

The product of its digits is 21600, while the sum is 33.

Adding to 123154543311 its reverse (113345451321), we get a palindrome (236499994632).

The spelling of 123154543311 in words is "one hundred twenty-three billion, one hundred fifty-four million, five hundred forty-three thousand, three hundred eleven".