12211212193811 has 2 divisors, whose sum is σ = 12211212193812. Its totient is φ = 12211212193810.

The previous prime is 12211212193801. The next prime is 12211212193819. The reversal of 12211212193811 is 11839121211221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12211212193811 - 2²⁶ = 12211145084947 is a prime.

It is a super-2 number, since 2×12211212193811² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12211212193819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105606096905 + 6105606096906.

It is an arithmetic number, because the mean of its divisors is an integer number (6105606096906).

Almost surely, 2^{12211212193811} is an apocalyptic number.

12211212193811 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211212193811 is an equidigital number, since it uses as much as digits as its factorization.

12211212193811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 35.

The spelling of 12211212193811 in words is "twelve trillion, two hundred eleven billion, two hundred twelve million, one hundred ninety-three thousand, eight hundred eleven".