21122011219 has 16 divisors (see below), whose sum is σ = 22748028160. Its totient is φ = 19551780000.

The previous prime is 21122011217. The next prime is 21122011243. The reversal of 21122011219 is 91211022112.

It is a cyclic number.

It is not a de Polignac number, because 21122011219 - 2¹ = 21122011217 is a prime.

It is a super-2 number, since 2×21122011219² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21122011219.

It is not an unprimeable number, because it can be changed into a prime (21122011213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114664 + ... + 235354.

It is an arithmetic number, because the mean of its divisors is an integer number (1421751760).

Almost surely, 2^21122011219 is an apocalyptic number.

21122011219 is a deficient number, since it is larger than the sum of its proper divisors (1626016941).

21122011219 is a wasteful number, since it uses less digits than its factorization.

21122011219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120922.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 21122011219 in words is "twenty-one billion, one hundred twenty-two million, eleven thousand, two hundred nineteen".