22212101222021 has 4 divisors (see below), whose sum is σ = 22267492996044. Its totient is φ = 22156709448000.

The previous prime is 22212101222011. The next prime is 22212101222033. The reversal of 22212101222021 is 12022210121222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15142293516100 + 7069807705921 = 3891310^2 + 2658911^2 .

It is a cyclic number.

It is not a de Polignac number, because 22212101222021 - 2⁶ = 22212101221957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22212101221984 and 22212101222002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212101222011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27695886410 + ... + 27695887211.

It is an arithmetic number, because the mean of its divisors is an integer number (5566873249011).

Almost surely, 2^{22212101222021} is an apocalyptic number.

It is an amenable number.

22212101222021 is a deficient number, since it is larger than the sum of its proper divisors (55391774023).

22212101222021 is an equidigital number, since it uses as much as digits as its factorization.

22212101222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55391774022.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22212101222021 its reverse (12022210121222), we get a palindrome (34234311343243).

The spelling of 22212101222021 in words is "twenty-two trillion, two hundred twelve billion, one hundred one million, two hundred twenty-two thousand, twenty-one".