2212222220021 has 4 divisors (see below), whose sum is σ = 2413333330944. Its totient is φ = 2011111109100.

The previous prime is 2212222220003. The next prime is 2212222220051. The reversal of 2212222220021 is 1200222222122.

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-2212222220021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2212222219975 and 2212222220002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212222220051) 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, 100555555445 + ... + 100555555466.

It is an arithmetic number, because the mean of its divisors is an integer number (603333332736).

Almost surely, 2^{2212222220021} is an apocalyptic number.

It is an amenable number.

2212222220021 is a deficient number, since it is larger than the sum of its proper divisors (201111110923).

2212222220021 is a wasteful number, since it uses less digits than its factorization.

2212222220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201111110922.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 2212222220021 its reverse (1200222222122), we get a palindrome (3412444442143).

The spelling of 2212222220021 in words is "two trillion, two hundred twelve billion, two hundred twenty-two million, two hundred twenty thousand, twenty-one".