2421020191 has 2 divisors, whose sum is σ = 2421020192. Its totient is φ = 2421020190.

The previous prime is 2421020179. The next prime is 2421020213. The reversal of 2421020191 is 1910201242.

2421020191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (2421020213) can be obtained adding 2421020191 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2421020191 - 2⁵ = 2421020159 is a prime.

It is a super-2 number, since 2×2421020191² = 11722677530459352962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2421020291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210510095 + 1210510096.

It is an arithmetic number, because the mean of its divisors is an integer number (1210510096).

Almost surely, 2^2421020191 is an apocalyptic number.

2421020191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421020191 is an equidigital number, since it uses as much as digits as its factorization.

2421020191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 2421020191 is about 49203.8635779753. The cubic root of 2421020191 is about 1342.7633239295.

The spelling of 2421020191 in words is "two billion, four hundred twenty-one million, twenty thousand, one hundred ninety-one".