21122112219 has 16 divisors (see below), whose sum is σ = 30744659232. Its totient is φ = 12820163328.

The previous prime is 21122112217. The next prime is 21122112227. The reversal of 21122112219 is 91221122112.

It is not a de Polignac number, because 21122112219 - 2¹ = 21122112217 is a prime.

It is a super-2 number, since 2×21122112219² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122112217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3706692 + ... + 3712385.

It is an arithmetic number, because the mean of its divisors is an integer number (1921541202).

Almost surely, 2^21122112219 is an apocalyptic number.

21122112219 is a deficient number, since it is larger than the sum of its proper divisors (9622547013).

21122112219 is a wasteful number, since it uses less digits than its factorization.

21122112219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7419166.

The product of its digits is 288, while the sum is 24.

The spelling of 21122112219 in words is "twenty-one billion, one hundred twenty-two million, one hundred twelve thousand, two hundred nineteen".