19211039221 has 8 divisors (see below), whose sum is σ = 21082993344. Its totient is φ = 17360001120.

The previous prime is 19211039203. The next prime is 19211039231. The reversal of 19211039221 is 12293011291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19211039221 - 2⁵ = 19211039189 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 (19211039231) 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 7 ways as a sum of consecutive naturals, for example, 5227080 + ... + 5230753.

It is an arithmetic number, because the mean of its divisors is an integer number (2635374168).

Almost surely, 2^19211039221 is an apocalyptic number.

19211039221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19211039221 is a deficient number, since it is larger than the sum of its proper divisors (1871954123).

19211039221 is a wasteful number, since it uses less digits than its factorization.

19211039221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10458011.

The product of its (nonzero) digits is 1944, while the sum is 31.

The spelling of 19211039221 in words is "nineteen billion, two hundred eleven million, thirty-nine thousand, two hundred twenty-one".