12101311043 has 4 divisors (see below), whose sum is σ = 12237280920. Its totient is φ = 11965341168.

The previous prime is 12101310997. The next prime is 12101311049. The reversal of 12101311043 is 34011310121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34011310121 = 61 ⋅557562461.

It is a cyclic number.

It is not a de Polignac number, because 12101311043 - 2⁶ = 12101310979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12101311049) 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, 67984805 + ... + 67984982.

It is an arithmetic number, because the mean of its divisors is an integer number (3059320230).

Almost surely, 2^12101311043 is an apocalyptic number.

12101311043 is a deficient number, since it is larger than the sum of its proper divisors (135969877).

12101311043 is an equidigital number, since it uses as much as digits as its factorization.

12101311043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135969876.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12101311043 its reverse (34011310121), we get a palindrome (46112621164).

The spelling of 12101311043 in words is "twelve billion, one hundred one million, three hundred eleven thousand, forty-three".