22001111110021 has 4 divisors (see below), whose sum is σ = 22084765525152. Its totient is φ = 21917456694892.

The previous prime is 22001111110009. The next prime is 22001111110031. The reversal of 22001111110021 is 12001111110022.

It is a happy number.

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 not a de Polignac number, because 22001111110021 - 2¹⁹ = 22001110585733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22001111109983 and 22001111110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001111110031) 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, 41827207171 + ... + 41827207696.

It is an arithmetic number, because the mean of its divisors is an integer number (5521191381288).

Almost surely, 2^{22001111110021} is an apocalyptic number.

It is an amenable number.

22001111110021 is a deficient number, since it is larger than the sum of its proper divisors (83654415131).

22001111110021 is an equidigital number, since it uses as much as digits as its factorization.

22001111110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83654415130.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 22001111110021 its reverse (12001111110022), we get a palindrome (34002222220043).

Subtracting from 22001111110021 its reverse (12001111110022), we obtain a palindrome (9999999999999).

The spelling of 22001111110021 in words is "twenty-two trillion, one billion, one hundred eleven million, one hundred ten thousand, twenty-one".