22221012421 has 8 divisors (see below), whose sum is σ = 22341456000. Its totient is φ = 22100657040.

The previous prime is 22221012361. The next prime is 22221012479. The reversal of 22221012421 is 12421012222.

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 22221012421 - 2²¹ = 22218915269 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 (22221012721) 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, 518895 + ... + 560083.

It is an arithmetic number, because the mean of its divisors is an integer number (2792682000).

Almost surely, 2^22221012421 is an apocalyptic number.

It is an amenable number.

22221012421 is a deficient number, since it is larger than the sum of its proper divisors (120443579).

22221012421 is a wasteful number, since it uses less digits than its factorization.

22221012421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44099.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22221012421 its reverse (12421012222), we get a palindrome (34642024643).

The spelling of 22221012421 in words is "twenty-two billion, two hundred twenty-one million, twelve thousand, four hundred twenty-one".