2115511123 has 12 divisors (see below), whose sum is σ = 2327021200. Its totient is φ = 1921780080.

The previous prime is 2115511117. The next prime is 2115511133. The reversal of 2115511123 is 3211155112.

It is not a de Polignac number, because 2115511123 - 2¹³ = 2115502931 is a prime.

It is a super-2 number, since 2×2115511123² = 8950774623073442258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2115511094 and 2115511103.

It is not an unprimeable number, because it can be changed into a prime (2115511133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181786 + ... + 193072.

Almost surely, 2^2115511123 is an apocalyptic number.

2115511123 is a deficient number, since it is larger than the sum of its proper divisors (211510077).

2115511123 is a wasteful number, since it uses less digits than its factorization.

2115511123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12858 (or 12847 counting only the distinct ones).

The product of its digits is 300, while the sum is 22.

The square root of 2115511123 is about 45994.6858126023. The cubic root of 2115511123 is about 1283.7243262157.

Adding to 2115511123 its reverse (3211155112), we get a palindrome (5326666235).

The spelling of 2115511123 in words is "two billion, one hundred fifteen million, five hundred eleven thousand, one hundred twenty-three".