1212211201219 has 4 divisors (see below), whose sum is σ = 1241777328120. Its totient is φ = 1182645074320.

The previous prime is 1212211201177. The next prime is 1212211201237. The reversal of 1212211201219 is 9121021122121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212211201219 is a prime.

It is a super-2 number, since 2×1212211201219² (a number of 25 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 = 1212211201193 and 1212211201202.

It is not an unprimeable number, because it can be changed into a prime (1212211201249) 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 in 3 ways as a sum of consecutive naturals, for example, 14783063389 + ... + 14783063470.

It is an arithmetic number, because the mean of its divisors is an integer number (310444332030).

Almost surely, 2^{1212211201219} is an apocalyptic number.

1212211201219 is a deficient number, since it is larger than the sum of its proper divisors (29566126901).

1212211201219 is an equidigital number, since it uses as much as digits as its factorization.

1212211201219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29566126900.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 1212211201219 in words is "one trillion, two hundred twelve billion, two hundred eleven million, two hundred one thousand, two hundred nineteen".