1020200201221 has 2 divisors, whose sum is σ = 1020200201222. Its totient is φ = 1020200201220.

The previous prime is 1020200201213. The next prime is 1020200201261. The reversal of 1020200201221 is 1221020020201.

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., 611502104196 + 408698097025 = 781986^2 + 639295^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020200201221 - 2³ = 1020200201213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020200201261) 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, 510100100610 + 510100100611.

It is an arithmetic number, because the mean of its divisors is an integer number (510100100611).

Almost surely, 2^{1020200201221} is an apocalyptic number.

It is an amenable number.

1020200201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020200201221 is an equidigital number, since it uses as much as digits as its factorization.

1020200201221 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1020200201221 its reverse (1221020020201), we get a palindrome (2241220221422).

The spelling of 1020200201221 in words is "one trillion, twenty billion, two hundred million, two hundred one thousand, two hundred twenty-one".