12021431043 has 12 divisors (see below), whose sum is σ = 16916585928. Its totient is φ = 7592482080.

The previous prime is 12021431021. The next prime is 12021431053. The reversal of 12021431043 is 34013412021.

It is not a de Polignac number, because 12021431043 - 2⁸ = 12021430787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12021431003) 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, 5548978 + ... + 5551143.

It is an arithmetic number, because the mean of its divisors is an integer number (1409715494).

Almost surely, 2^12021431043 is an apocalyptic number.

12021431043 is a deficient number, since it is larger than the sum of its proper divisors (4895154885).

12021431043 is a wasteful number, since it uses less digits than its factorization.

12021431043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11100162 (or 11100143 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 12021431043 its reverse (34013412021), we get a palindrome (46034843064).

The spelling of 12021431043 in words is "twelve billion, twenty-one million, four hundred thirty-one thousand, forty-three".