221212261199 has 2 divisors, whose sum is σ = 221212261200. Its totient is φ = 221212261198.

The previous prime is 221212261147. The next prime is 221212261211. The reversal of 221212261199 is 991162212122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221212261199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221212261999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110606130599 + 110606130600.

It is an arithmetic number, because the mean of its divisors is an integer number (110606130600).

Almost surely, 2^221212261199 is an apocalyptic number.

221212261199 is a deficient number, since it is larger than the sum of its proper divisors (1).

221212261199 is an equidigital number, since it uses as much as digits as its factorization.

221212261199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 38.

The spelling of 221212261199 in words is "two hundred twenty-one billion, two hundred twelve million, two hundred sixty-one thousand, one hundred ninety-nine".