22112002022021 has 4 divisors (see below), whose sum is σ = 22174642254732. Its totient is φ = 22049361789312.

The previous prime is 22112002021979. The next prime is 22112002022041. The reversal of 22112002022021 is 12022020021122.

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 17688425589121 + 4423576432900 = 4205761^2 + 2103230^2 .

It is a cyclic number.

It is not a de Polignac number, because 22112002022021 - 2³⁸ = 21837124115077 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 (22112002022041) 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, 31320115826 + ... + 31320116531.

It is an arithmetic number, because the mean of its divisors is an integer number (5543660563683).

Almost surely, 2^{22112002022021} is an apocalyptic number.

It is an amenable number.

22112002022021 is a deficient number, since it is larger than the sum of its proper divisors (62640232711).

22112002022021 is an equidigital number, since it uses as much as digits as its factorization.

22112002022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62640232710.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22112002022021 its reverse (12022020021122), we get a palindrome (34134022043143).

The spelling of 22112002022021 in words is "twenty-two trillion, one hundred twelve billion, two million, twenty-two thousand, twenty-one".