2019212101 has 4 divisors (see below), whose sum is σ = 2019326400. Its totient is φ = 2019097804.

The previous prime is 2019212089. The next prime is 2019212119. The reversal of 2019212101 is 1012129102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2019212101 - 2²⁵ = 1985657669 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 (2019212161) 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, 24391 + ... + 68068.

It is an arithmetic number, because the mean of its divisors is an integer number (504831600).

Almost surely, 2^2019212101 is an apocalyptic number.

It is an amenable number.

2019212101 is a deficient number, since it is larger than the sum of its proper divisors (114299).

2019212101 is an equidigital number, since it uses as much as digits as its factorization.

2019212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114298.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 2019212101 is about 44935.6439922697. The cubic root of 2019212101 is about 1263.9424889462.

The spelling of 2019212101 in words is "two billion, nineteen million, two hundred twelve thousand, one hundred one".