1221101110199 has 2 divisors, whose sum is σ = 1221101110200. Its totient is φ = 1221101110198.

The previous prime is 1221101110171. The next prime is 1221101110223. The reversal of 1221101110199 is 9910111011221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221101110199 is a prime.

It is a super-3 number, since 3×1221101110199³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221101110129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610550555099 + 610550555100.

It is an arithmetic number, because the mean of its divisors is an integer number (610550555100).

Almost surely, 2^{1221101110199} is an apocalyptic number.

1221101110199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221101110199 is an equidigital number, since it uses as much as digits as its factorization.

1221101110199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 29.

The spelling of 1221101110199 in words is "one trillion, two hundred twenty-one billion, one hundred one million, one hundred ten thousand, one hundred ninety-nine".