21122221000019 has 4 divisors (see below), whose sum is σ = 21122266193520. Its totient is φ = 21122175806520.

The previous prime is 21122220999989. The next prime is 21122221000051. The reversal of 21122221000019 is 91000012222112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21122221000019 - 2²⁴ = 21122204222803 is a prime.

It is a super-2 number, since 2×21122221000019² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21122220999958 and 21122221000003.

It is not an unprimeable number, because it can be changed into a prime (21122221000819) 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, 21888287 + ... + 22832904.

It is an arithmetic number, because the mean of its divisors is an integer number (5280566548380).

Almost surely, 2^{21122221000019} is an apocalyptic number.

21122221000019 is a deficient number, since it is larger than the sum of its proper divisors (45193501).

21122221000019 is an equidigital number, since it uses as much as digits as its factorization.

21122221000019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45193500.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 21122221000019 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred twenty-one million, nineteen", and thus it is an aban number.