12013453421 has 8 divisors (see below), whose sum is σ = 12133158840. Its totient is φ = 11893920768.

The previous prime is 12013453349. The next prime is 12013453457. The reversal of 12013453421 is 12435431021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4446889225 + 7566564196 = 66685^2 + 86986^2 .

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 12013453421 - 2²² = 12009259117 is a prime.

It is a super-5 number, since 5×12013453421⁵ (a number of 52 digits) contains 55555 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013453481) 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, 98885 + ... + 183861.

It is an arithmetic number, because the mean of its divisors is an integer number (1516644855).

Almost surely, 2^12013453421 is an apocalyptic number.

It is an amenable number.

12013453421 is a deficient number, since it is larger than the sum of its proper divisors (119705419).

12013453421 is a wasteful number, since it uses less digits than its factorization.

12013453421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86383.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 12013453421 its reverse (12435431021), we get a palindrome (24448884442).

The spelling of 12013453421 in words is "twelve billion, thirteen million, four hundred fifty-three thousand, four hundred twenty-one".