19101900101 has 4 divisors (see below), whose sum is σ = 19106205804. Its totient is φ = 19097594400.

The previous prime is 19101900079. The next prime is 19101900113. The reversal of 19101900101 is 10100910191.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7945048225 + 11156851876 = 89135^2 + 105626^2 .

It is a cyclic number.

It is not a de Polignac number, because 19101900101 - 2¹⁰ = 19101899077 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 (19101900161) 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 3 ways as a sum of consecutive naturals, for example, 2146190 + ... + 2155071.

It is an arithmetic number, because the mean of its divisors is an integer number (4776551451).

Almost surely, 2^19101900101 is an apocalyptic number.

It is an amenable number.

19101900101 is a deficient number, since it is larger than the sum of its proper divisors (4305703).

19101900101 is an equidigital number, since it uses as much as digits as its factorization.

19101900101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4305702.

The product of its (nonzero) digits is 81, while the sum is 23.

The spelling of 19101900101 in words is "nineteen billion, one hundred one million, nine hundred thousand, one hundred one".