12021403343 has 4 divisors (see below), whose sum is σ = 12248222328. Its totient is φ = 11794584360.

The previous prime is 12021403249. The next prime is 12021403349. The reversal of 12021403343 is 34330412021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34330412021 = 21683 ⋅1583287.

It is a cyclic number.

It is not a de Polignac number, because 12021403343 - 2⁸ = 12021403087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021403349) 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, 113409413 + ... + 113409518.

It is an arithmetic number, because the mean of its divisors is an integer number (3062055582).

Almost surely, 2^12021403343 is an apocalyptic number.

12021403343 is a deficient number, since it is larger than the sum of its proper divisors (226818985).

12021403343 is an equidigital number, since it uses as much as digits as its factorization.

12021403343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226818984.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 12021403343 its reverse (34330412021), we get a palindrome (46351815364).

The spelling of 12021403343 in words is "twelve billion, twenty-one million, four hundred three thousand, three hundred forty-three".