2219901222221 has 4 divisors (see below), whose sum is σ = 2253034076352. Its totient is φ = 2186768368092.

The previous prime is 2219901222211. The next prime is 2219901222239. The reversal of 2219901222221 is 1222221099122.

It is a happy number.

2219901222221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-2219901222221 is a prime.

It is a super-2 number, since 2×2219901222221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2219901222211) 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, 16566426965 + ... + 16566427098.

It is an arithmetic number, because the mean of its divisors is an integer number (563258519088).

Almost surely, 2^{2219901222221} is an apocalyptic number.

It is an amenable number.

2219901222221 is a deficient number, since it is larger than the sum of its proper divisors (33132854131).

2219901222221 is an equidigital number, since it uses as much as digits as its factorization.

2219901222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33132854130.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 2219901222221 in words is "two trillion, two hundred nineteen billion, nine hundred one million, two hundred twenty-two thousand, two hundred twenty-one".