22221421221021 has 16 divisors (see below), whose sum is σ = 32343014853120. Its totient is φ = 13458799836720.

The previous prime is 22221421221011. The next prime is 22221421221031. The reversal of 22221421221021 is 12012212412222.

It is an interprime number because it is at equal distance from previous prime (22221421221011) and next prime (22221421221031).

It is not a de Polignac number, because 22221421221021 - 2⁷ = 22221421220893 is a prime.

It is a super-2 number, since 2×22221421221021² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22221421220982 and 22221421221000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221421221001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218152711 + ... + 218254548.

It is an arithmetic number, because the mean of its divisors is an integer number (2021438428320).

Almost surely, 2^{22221421221021} is an apocalyptic number.

It is an amenable number.

22221421221021 is a deficient number, since it is larger than the sum of its proper divisors (10121593632099).

22221421221021 is a wasteful number, since it uses less digits than its factorization.

22221421221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436408816.

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 22221421221021 its reverse (12012212412222), we get a palindrome (34233633633243).

The spelling of 22221421221021 in words is "twenty-two trillion, two hundred twenty-one billion, four hundred twenty-one million, two hundred twenty-one thousand, twenty-one".