199111221022111 has 6 divisors (see below), whose sum is σ = 208144622354480. Its totient is φ = 190454211411948.

The previous prime is 199111221021953. The next prime is 199111221022123. The reversal of 199111221022111 is 111220122111991.

It is not a de Polignac number, because 199111221022111 - 2³³ = 199102631087519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199111221092111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 188195860551 + ... + 188195861608.

Almost surely, 2^{199111221022111} is an apocalyptic number.

199111221022111 is a deficient number, since it is larger than the sum of its proper divisors (9033401332369).

199111221022111 is an equidigital number, since it uses as much as digits as its factorization.

199111221022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376391722205 (or 376391722182 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 34.

The spelling of 199111221022111 in words is "one hundred ninety-nine trillion, one hundred eleven billion, two hundred twenty-one million, twenty-two thousand, one hundred eleven".