21402222233021 has 8 divisors (see below), whose sum is σ = 24459727017024. Its totient is φ = 18344728565280.

The previous prime is 21402222233009. The next prime is 21402222233053. The reversal of 21402222233021 is 12033222220412.

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 21402222233021 - 2¹⁴ = 21402222216637 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 (21402222233521) 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, 1863686 + ... + 6802776.

It is an arithmetic number, because the mean of its divisors is an integer number (3057465877128).

Almost surely, 2^{21402222233021} is an apocalyptic number.

It is an amenable number.

21402222233021 is a deficient number, since it is larger than the sum of its proper divisors (3057504784003).

21402222233021 is an equidigital number, since it uses as much as digits as its factorization.

21402222233021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5558131.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21402222233021 its reverse (12033222220412), we get a palindrome (33435444453433).

The spelling of 21402222233021 in words is "twenty-one trillion, four hundred two billion, two hundred twenty-two million, two hundred thirty-three thousand, twenty-one".