22120021121021 has 4 divisors (see below), whose sum is σ = 22120119039072. Its totient is φ = 22119923202972.

The previous prime is 22120021120919. The next prime is 22120021121117. The reversal of 22120021121021 is 12012112002122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22120021121021 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 (22120021121321) 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, 48619385 + ... + 49072238.

It is an arithmetic number, because the mean of its divisors is an integer number (5530029759768).

Almost surely, 2^{22120021121021} is an apocalyptic number.

It is an amenable number.

22120021121021 is a deficient number, since it is larger than the sum of its proper divisors (97918051).

22120021121021 is an equidigital number, since it uses as much as digits as its factorization.

22120021121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97918050.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22120021121021 its reverse (12012112002122), we get a palindrome (34132133123143).

The spelling of 22120021121021 in words is "twenty-two trillion, one hundred twenty billion, twenty-one million, one hundred twenty-one thousand, twenty-one".