11611400123 has 6 divisors (see below), whose sum is σ = 11887714404. Its totient is φ = 11341365756.

The previous prime is 11611400077. The next prime is 11611400131. The reversal of 11611400123 is 32100411611.

It is a happy number.

It is not a de Polignac number, because 11611400123 - 2²⁰ = 11610351547 is a prime.

It is a super-2 number, since 2×11611400123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11611400095 and 11611400104.

It is not an unprimeable number, because it can be changed into a prime (11611400153) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3138065 + ... + 3141762.

It is an arithmetic number, because the mean of its divisors is an integer number (1981285734).

Almost surely, 2^11611400123 is an apocalyptic number.

11611400123 is a deficient number, since it is larger than the sum of its proper divisors (276314281).

11611400123 is an frugal number, since it uses more digits than its factorization.

11611400123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6279913 (or 6279870 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 11611400123 its reverse (32100411611), we get a palindrome (43711811734).

The spelling of 11611400123 in words is "eleven billion, six hundred eleven million, four hundred thousand, one hundred twenty-three".