222421012021 has 8 divisors (see below), whose sum is σ = 239539376384. Its totient is φ = 205303941360.

The previous prime is 222421012013. The next prime is 222421012027. The reversal of 222421012021 is 120210124222.

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 222421012021 - 2³ = 222421012013 is a prime.

It is a super-4 number, since 4×222421012021⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222421012021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222421012027) 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, 49600 + ... + 668806.

It is an arithmetic number, because the mean of its divisors is an integer number (29942422048).

Almost surely, 2^222421012021 is an apocalyptic number.

It is an amenable number.

222421012021 is a deficient number, since it is larger than the sum of its proper divisors (17118364363).

222421012021 is a wasteful number, since it uses less digits than its factorization.

222421012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646851.

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

Adding to 222421012021 its reverse (120210124222), we get a palindrome (342631136243).

The spelling of 222421012021 in words is "two hundred twenty-two billion, four hundred twenty-one million, twelve thousand, twenty-one".