1211211112219 has 2 divisors, whose sum is σ = 1211211112220. Its totient is φ = 1211211112218.

The previous prime is 1211211112201. The next prime is 1211211112273. The reversal of 1211211112219 is 9122111121121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211211112219 - 2²¹ = 1211209015067 is a prime.

It is a super-2 number, since 2×1211211112219² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211211112193 and 1211211112202.

It is not a weakly prime, because it can be changed into another prime (1211211112019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605605556109 + 605605556110.

It is an arithmetic number, because the mean of its divisors is an integer number (605605556110).

Almost surely, 2^{1211211112219} is an apocalyptic number.

1211211112219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211211112219 is an equidigital number, since it uses as much as digits as its factorization.

1211211112219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 25.

The spelling of 1211211112219 in words is "one trillion, two hundred eleven billion, two hundred eleven million, one hundred twelve thousand, two hundred nineteen".