2022221491 has 2 divisors, whose sum is σ = 2022221492. Its totient is φ = 2022221490.

The previous prime is 2022221489. The next prime is 2022221507. The reversal of 2022221491 is 1941222202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2022221491 - 2¹ = 2022221489 is a prime.

Together with 2022221489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2022227491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1011110745 + 1011110746.

It is an arithmetic number, because the mean of its divisors is an integer number (1011110746).

Almost surely, 2^2022221491 is an apocalyptic number.

2022221491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2022221491 is an equidigital number, since it uses as much as digits as its factorization.

2022221491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 2022221491 is about 44969.1170805031. The cubic root of 2022221491 is about 1264.5700947665.

Adding to 2022221491 its reverse (1941222202), we get a palindrome (3963443693).

The spelling of 2022221491 in words is "two billion, twenty-two million, two hundred twenty-one thousand, four hundred ninety-one".