1021222087 has 2 divisors, whose sum is σ = 1021222088. Its totient is φ = 1021222086.

The previous prime is 1021222067. The next prime is 1021222133. The reversal of 1021222087 is 7802221201.

It is a weak prime.

It is an emirp because it is prime and its reverse (7802221201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021222087 - 2⁷ = 1021221959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021222067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510611043 + 510611044.

It is an arithmetic number, because the mean of its divisors is an integer number (510611044).

Almost surely, 2^1021222087 is an apocalyptic number.

1021222087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021222087 is an equidigital number, since it uses as much as digits as its factorization.

1021222087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 1021222087 is about 31956.5656321201. The cubic root of 1021222087 is about 1007.0245688905.

Adding to 1021222087 its reverse (7802221201), we get a palindrome (8823443288).

The spelling of 1021222087 in words is "one billion, twenty-one million, two hundred twenty-two thousand, eighty-seven".