12115861833 has 4 divisors (see below), whose sum is σ = 16154482448. Its totient is φ = 8077241220.

The previous prime is 12115861829. The next prime is 12115861861. The reversal of 12115861833 is 33816851121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12115861833 - 2² = 12115861829 is a prime.

It is a super-2 number, since 2×12115861833² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12115861791 and 12115861800.

It is not an unprimeable number, because it can be changed into a prime (12115861873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2019310303 + ... + 2019310308.

It is an arithmetic number, because the mean of its divisors is an integer number (4038620612).

Almost surely, 2^12115861833 is an apocalyptic number.

It is an amenable number.

12115861833 is a deficient number, since it is larger than the sum of its proper divisors (4038620615).

12115861833 is an equidigital number, since it uses as much as digits as its factorization.

12115861833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4038620614.

The product of its digits is 34560, while the sum is 39.

The spelling of 12115861833 in words is "twelve billion, one hundred fifteen million, eight hundred sixty-one thousand, eight hundred thirty-three".