19990201211 has 4 divisors (see below), whose sum is σ = 19990594032. Its totient is φ = 19989808392.

The previous prime is 19990201199. The next prime is 19990201241. The reversal of 19990201211 is 11210209991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19990201211 - 2¹⁰ = 19990200187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19990201241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106295 + ... + 226448.

It is an arithmetic number, because the mean of its divisors is an integer number (4997648508).

Almost surely, 2^19990201211 is an apocalyptic number.

19990201211 is a deficient number, since it is larger than the sum of its proper divisors (392821).

19990201211 is an equidigital number, since it uses as much as digits as its factorization.

19990201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392820.

The product of its (nonzero) digits is 2916, while the sum is 35.

The spelling of 19990201211 in words is "nineteen billion, nine hundred ninety million, two hundred one thousand, two hundred eleven".