12021314421 has 8 divisors (see below), whose sum is σ = 16872020320. Its totient is φ = 7592409072.

The previous prime is 12021314381. The next prime is 12021314441. The reversal of 12021314421 is 12441312021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-12021314421 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 (12021314441) 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, 105450070 + ... + 105450183.

It is an arithmetic number, because the mean of its divisors is an integer number (2109002540).

Almost surely, 2^12021314421 is an apocalyptic number.

It is an amenable number.

12021314421 is a deficient number, since it is larger than the sum of its proper divisors (4850705899).

12021314421 is a wasteful number, since it uses less digits than its factorization.

12021314421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210900275.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 12021314421 its reverse (12441312021), we get a palindrome (24462626442).

The spelling of 12021314421 in words is "twelve billion, twenty-one million, three hundred fourteen thousand, four hundred twenty-one".