2021222087 has 2 divisors, whose sum is σ = 2021222088. Its totient is φ = 2021222086.

The previous prime is 2021222081. The next prime is 2021222111. The reversal of 2021222087 is 7802221202.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021222087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021222081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010611043 + 1010611044.

It is an arithmetic number, because the mean of its divisors is an integer number (1010611044).

Almost surely, 2^2021222087 is an apocalyptic number.

2021222087 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021222087 is an equidigital number, since it uses as much as digits as its factorization.

2021222087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 2021222087 is about 44958.0035922415. The cubic root of 2021222087 is about 1264.3617389771.

Adding to 2021222087 its reverse (7802221202), we get a palindrome (9823443289).

The spelling of 2021222087 in words is "two billion, twenty-one million, two hundred twenty-two thousand, eighty-seven".