1221101112199 has 4 divisors (see below), whose sum is σ = 1221127547536. Its totient is φ = 1221074676864.

The previous prime is 1221101112151. The next prime is 1221101112211. The reversal of 1221101112199 is 9912111011221.

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-1221101112199 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221101112199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221101110199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13148259 + ... + 13240804.

It is an arithmetic number, because the mean of its divisors is an integer number (305281886884).

Almost surely, 2^{1221101112199} is an apocalyptic number.

1221101112199 is a deficient number, since it is larger than the sum of its proper divisors (26435337).

1221101112199 is an equidigital number, since it uses as much as digits as its factorization.

1221101112199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26435336.

The product of its (nonzero) digits is 648, while the sum is 31.

The spelling of 1221101112199 in words is "one trillion, two hundred twenty-one billion, one hundred one million, one hundred twelve thousand, one hundred ninety-nine".