19910190101 has 8 divisors (see below), whose sum is σ = 21278401920. Its totient is φ = 18563869888.

The previous prime is 19910190071. The next prime is 19910190121. The reversal of 19910190101 is 10109101991.

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

It is a cyclic number.

It is not a de Polignac number, because 19910190101 - 2⁶ = 19910190037 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 (19910190121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5471021 + ... + 5474658.

It is an arithmetic number, because the mean of its divisors is an integer number (2659800240).

Almost surely, 2^19910190101 is an apocalyptic number.

It is an amenable number.

19910190101 is a deficient number, since it is larger than the sum of its proper divisors (1368211819).

19910190101 is a wasteful number, since it uses less digits than its factorization.

19910190101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10945803.

The product of its (nonzero) digits is 729, while the sum is 32.

The spelling of 19910190101 in words is "nineteen billion, nine hundred ten million, one hundred ninety thousand, one hundred one".