1022120221 has 2 divisors, whose sum is σ = 1022120222. Its totient is φ = 1022120220.

The previous prime is 1022120179. The next prime is 1022120269. The reversal of 1022120221 is 1220212201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1019524900 + 2595321 = 31930^2 + 1611^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022120221 - 2⁷ = 1022120093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022120321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511060110 + 511060111.

It is an arithmetic number, because the mean of its divisors is an integer number (511060111).

Almost surely, 2^1022120221 is an apocalyptic number.

It is an amenable number.

1022120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022120221 is an equidigital number, since it uses as much as digits as its factorization.

1022120221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1022120221 is about 31970.6149612421. The cubic root of 1022120221 is about 1007.3196982920.

Adding to 1022120221 its reverse (1220212201), we get a palindrome (2242332422).

The spelling of 1022120221 in words is "one billion, twenty-two million, one hundred twenty thousand, two hundred twenty-one".