21190919001 has 8 divisors (see below), whose sum is σ = 32290924224. Its totient is φ = 12109096560.

The previous prime is 21190918981. The next prime is 21190919011. The reversal of 21190919001 is 10091909112.

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

It is not a de Polignac number, because 21190919001 - 2⁷ = 21190918873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21190919011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504545670 + ... + 504545711.

It is an arithmetic number, because the mean of its divisors is an integer number (4036365528).

Almost surely, 2^21190919001 is an apocalyptic number.

21190919001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21190919001 is a deficient number, since it is larger than the sum of its proper divisors (11100005223).

21190919001 is a wasteful number, since it uses less digits than its factorization.

21190919001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009091391.

The product of its (nonzero) digits is 1458, while the sum is 33.

The spelling of 21190919001 in words is "twenty-one billion, one hundred ninety million, nine hundred nineteen thousand, one".