22122221020221 has 16 divisors (see below), whose sum is σ = 33711228160128. Its totient is φ = 12640827748800.

The previous prime is 22122221020219. The next prime is 22122221020231. The reversal of 22122221020221 is 12202012222122.

It is not a de Polignac number, because 22122221020221 - 2¹ = 22122221020219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22122221020231) 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, 17775690 + ... + 18979451.

It is an arithmetic number, because the mean of its divisors is an integer number (2106951760008).

Almost surely, 2^{22122221020221} is an apocalyptic number.

22122221020221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22122221020221 is a deficient number, since it is larger than the sum of its proper divisors (11589007139907).

22122221020221 is a wasteful number, since it uses less digits than its factorization.

22122221020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36783812.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22122221020221 its reverse (12202012222122), we get a palindrome (34324233242343).

The spelling of 22122221020221 in words is "twenty-two trillion, one hundred twenty-two billion, two hundred twenty-one million, twenty thousand, two hundred twenty-one".