2101201019 has 4 divisors (see below), whose sum is σ = 2101618200. Its totient is φ = 2100783840.

The previous prime is 2101201009. The next prime is 2101201033. The reversal of 2101201019 is 9101021012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101201019 is a prime.

It is a super-2 number, since 2×2101201019² = 8830091444493276722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101200988 and 2101201006.

It is not an unprimeable number, because it can be changed into a prime (2101201009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200942 + ... + 211139.

It is an arithmetic number, because the mean of its divisors is an integer number (525404550).

Almost surely, 2^2101201019 is an apocalyptic number.

2101201019 is a deficient number, since it is larger than the sum of its proper divisors (417181).

2101201019 is an equidigital number, since it uses as much as digits as its factorization.

2101201019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417180.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 2101201019 is about 45838.8592680926. The cubic root of 2101201019 is about 1280.8232454320.

The spelling of 2101201019 in words is "two billion, one hundred one million, two hundred one thousand, nineteen".