201200221021 has 2 divisors, whose sum is σ = 201200221022. Its totient is φ = 201200221020.

The previous prime is 201200220967. The next prime is 201200221063. The reversal of 201200221021 is 120122002102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179292964900 + 21907256121 = 423430^2 + 148011^2 .

It is a cyclic number.

It is not a de Polignac number, because 201200221021 - 2¹⁵ = 201200188253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201200220992 and 201200221010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201200221921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100600110510 + 100600110511.

It is an arithmetic number, because the mean of its divisors is an integer number (100600110511).

Almost surely, 2^201200221021 is an apocalyptic number.

It is an amenable number.

201200221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201200221021 is an equidigital number, since it uses as much as digits as its factorization.

201200221021 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 201200221021 its reverse (120122002102), we get a palindrome (321322223123).

The spelling of 201200221021 in words is "two hundred one billion, two hundred million, two hundred twenty-one thousand, twenty-one".