1211212220219 has 2 divisors, whose sum is σ = 1211212220220. Its totient is φ = 1211212220218.

The previous prime is 1211212220209. The next prime is 1211212220269. The reversal of 1211212220219 is 9120222121121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211212220219 is a prime.

It is a super-2 number, since 2×1211212220219² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1211212220209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605606110109 + 605606110110.

It is an arithmetic number, because the mean of its divisors is an integer number (605606110110).

Almost surely, 2^{1211212220219} is an apocalyptic number.

1211212220219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211212220219 is an equidigital number, since it uses as much as digits as its factorization.

1211212220219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 1211212220219 in words is "one trillion, two hundred eleven billion, two hundred twelve million, two hundred twenty thousand, two hundred nineteen".