23222121022021 has 4 divisors (see below), whose sum is σ = 23540232268972. Its totient is φ = 22904009775072.

The previous prime is 23222121022013. The next prime is 23222121022063. The reversal of 23222121022021 is 12022012122232.

It is a happy number.

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 8697721656100 + 14524399365921 = 2949190^2 + 3811089^2 .

It is a cyclic number.

It is not a de Polignac number, because 23222121022021 - 2³ = 23222121022013 is a prime.

It is a super-2 number, since 2×23222121022021² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23222121021983 and 23222121022001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23222121022721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159055623366 + ... + 159055623511.

It is an arithmetic number, because the mean of its divisors is an integer number (5885058067243).

Almost surely, 2^{23222121022021} is an apocalyptic number.

It is an amenable number.

23222121022021 is a deficient number, since it is larger than the sum of its proper divisors (318111246951).

23222121022021 is an equidigital number, since it uses as much as digits as its factorization.

23222121022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318111246950.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 23222121022021 its reverse (12022012122232), we get a palindrome (35244133144253).

The spelling of 23222121022021 in words is "twenty-three trillion, two hundred twenty-two billion, one hundred twenty-one million, twenty-two thousand, twenty-one".