22121222219 has 4 divisors (see below), whose sum is σ = 22165201296. Its totient is φ = 22077243144.

The previous prime is 22121222191. The next prime is 22121222231. The reversal of 22121222219 is 91222212122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91222212122 = 2 ⋅45611106061.

It is a cyclic number.

It is not a de Polignac number, because 22121222219 - 2²⁸ = 21852786763 is a prime.

It is a super-2 number, since 2×22121222219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121222269) 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, 21988784 + ... + 21989789.

It is an arithmetic number, because the mean of its divisors is an integer number (5541300324).

Almost surely, 2^22121222219 is an apocalyptic number.

22121222219 is a deficient number, since it is larger than the sum of its proper divisors (43979077).

22121222219 is an equidigital number, since it uses as much as digits as its factorization.

22121222219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43979076.

The product of its digits is 1152, while the sum is 26.

The spelling of 22121222219 in words is "twenty-two billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred nineteen".