123125535511 has 8 divisors (see below), whose sum is σ = 134551561104. Its totient is φ = 111738309120.

The previous prime is 123125535499. The next prime is 123125535551. The reversal of 123125535511 is 115535521321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123125535511 is a prime.

It is a super-2 number, since 2×123125535511² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123125535551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9693160 + ... + 9705853.

It is an arithmetic number, because the mean of its divisors is an integer number (16818945138).

Almost surely, 2^123125535511 is an apocalyptic number.

123125535511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123125535511 is a deficient number, since it is larger than the sum of its proper divisors (11426025593).

123125535511 is a wasteful number, since it uses less digits than its factorization.

123125535511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19399601.

The product of its digits is 22500, while the sum is 34.

The spelling of 123125535511 in words is "one hundred twenty-three billion, one hundred twenty-five million, five hundred thirty-five thousand, five hundred eleven".