11981123 has 8 divisors (see below), whose sum is σ = 14937600. Its totient is φ = 9335880.

The previous prime is 11981117. The next prime is 11981131. The reversal of 11981123 is 32118911.

11981123 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 11981123 - 2⁶ = 11981059 is a prime.

It is a super-2 number, since 2×11981123² = 287094616682258, 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 = 11981092 and 11981101.

It is not an unprimeable number, because it can be changed into a prime (11981113) 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, 77723 + ... + 77876.

It is an arithmetic number, because the mean of its divisors is an integer number (1867200).

Almost surely, 2^11981123 is an apocalyptic number.

11981123 is a deficient number, since it is larger than the sum of its proper divisors (2956477).

11981123 is a wasteful number, since it uses less digits than its factorization.

11981123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155617.

The product of its digits is 432, while the sum is 26.

The square root of 11981123 is about 3461.3758825068. The cubic root of 11981123 is about 228.8227367803.

The spelling of 11981123 in words is "eleven million, nine hundred eighty-one thousand, one hundred twenty-three".