21211121222219 has 2 divisors, whose sum is σ = 21211121222220. Its totient is φ = 21211121222218.

The previous prime is 21211121222209. The next prime is 21211121222233. The reversal of 21211121222219 is 91222212111212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21211121222219 is a prime.

It is a super-2 number, since 2×21211121222219² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21211121222191 and 21211121222200.

It is not a weakly prime, because it can be changed into another prime (21211121222209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605560611109 + 10605560611110.

It is an arithmetic number, because the mean of its divisors is an integer number (10605560611110).

Almost surely, 2^{21211121222219} is an apocalyptic number.

21211121222219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211121222219 is an equidigital number, since it uses as much as digits as its factorization.

21211121222219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 29.

The spelling of 21211121222219 in words is "twenty-one trillion, two hundred eleven billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred nineteen".