22121221000019 has 2 divisors, whose sum is σ = 22121221000020. Its totient is φ = 22121221000018.

The previous prime is 22121221000007. The next prime is 22121221000079. The reversal of 22121221000019 is 91000012212122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22121221000019 - 2⁴ = 22121221000003 is a prime.

It is a super-2 number, since 2×22121221000019² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22121220999958 and 22121221000003.

It is not a weakly prime, because it can be changed into another prime (22121221000079) 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 as a sum of consecutive naturals, namely, 11060610500009 + 11060610500010.

It is an arithmetic number, because the mean of its divisors is an integer number (11060610500010).

Almost surely, 2^{22121221000019} is an apocalyptic number.

22121221000019 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121221000019 is an equidigital number, since it uses as much as digits as its factorization.

22121221000019 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 22121221000019 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred twenty-one million, nineteen", and thus it is an aban number.