2021419091 has 4 divisors (see below), whose sum is σ = 2023220232. Its totient is φ = 2019617952.

The previous prime is 2021419087. The next prime is 2021419093. The reversal of 2021419091 is 1909141202.

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

It is a cyclic number.

It is not a de Polignac number, because 2021419091 - 2² = 2021419087 is a prime.

It is a super-2 number, since 2×2021419091² = 8172270282918532562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021419093) 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, 898886 + ... + 901131.

It is an arithmetic number, because the mean of its divisors is an integer number (505805058).

Almost surely, 2^2021419091 is an apocalyptic number.

2021419091 is a deficient number, since it is larger than the sum of its proper divisors (1801141).

2021419091 is a wasteful number, since it uses less digits than its factorization.

2021419091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801140.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 2021419091 is about 44960.1945169280. The cubic root of 2021419091 is about 1264.4028158136.

The spelling of 2021419091 in words is "two billion, twenty-one million, four hundred nineteen thousand, ninety-one".