22120001100021 has 16 divisors (see below), whose sum is σ = 32174686522368. Its totient is φ = 13406003161200.

The previous prime is 22120001099939. The next prime is 22120001100061. The reversal of 22120001100021 is 12000110002122.

It is a de Polignac number, because none of the positive numbers 2^k-22120001100021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120001100061) 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, 7011556 + ... + 9664466.

It is an arithmetic number, because the mean of its divisors is an integer number (2010917907648).

Almost surely, 2^{22120001100021} is an apocalyptic number.

It is an amenable number.

22120001100021 is a deficient number, since it is larger than the sum of its proper divisors (10054685422347).

22120001100021 is a wasteful number, since it uses less digits than its factorization.

22120001100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2905592.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 22120001100021 its reverse (12000110002122), we get a palindrome (34120111102143).

It can be divided in two parts, 22 and 120001100021, that multiplied together give a palindrome (2640024200462).

The spelling of 22120001100021 in words is "twenty-two trillion, one hundred twenty billion, one million, one hundred thousand, twenty-one".