1022405221 has 2 divisors, whose sum is σ = 1022405222. Its totient is φ = 1022405220.

The previous prime is 1022405207. The next prime is 1022405287. The reversal of 1022405221 is 1225042201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1016716996 + 5688225 = 31886^2 + 2385^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022405221 - 2¹⁵ = 1022372453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022405291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511202610 + 511202611.

It is an arithmetic number, because the mean of its divisors is an integer number (511202611).

Almost surely, 2^1022405221 is an apocalyptic number.

It is an amenable number.

1022405221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022405221 is an equidigital number, since it uses as much as digits as its factorization.

1022405221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1022405221 is about 31975.0718685666. The cubic root of 1022405221 is about 1007.4133139709.

Adding to 1022405221 its reverse (1225042201), we get a palindrome (2247447422).

The spelling of 1022405221 in words is "one billion, twenty-two million, four hundred five thousand, two hundred twenty-one".