1020022261 has 2 divisors, whose sum is σ = 1020022262. Its totient is φ = 1020022260.

The previous prime is 1020022189. The next prime is 1020022273. The reversal of 1020022261 is 1622200201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 576288036 + 443734225 = 24006^2 + 21065^2 .

It is an emirp because it is prime and its reverse (1622200201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020022261 - 2⁹ = 1020021749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020022361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510011130 + 510011131.

It is an arithmetic number, because the mean of its divisors is an integer number (510011131).

Almost surely, 2^1020022261 is an apocalyptic number.

It is an amenable number.

1020022261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020022261 is an equidigital number, since it uses as much as digits as its factorization.

1020022261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1020022261 is about 31937.7873529147. The cubic root of 1020022261 is about 1006.6300325226.

Adding to 1020022261 its reverse (1622200201), we get a palindrome (2642222462).

The spelling of 1020022261 in words is "one billion, twenty million, twenty-two thousand, two hundred sixty-one".