102020221201 has 2 divisors, whose sum is σ = 102020221202. Its totient is φ = 102020221200.

The previous prime is 102020221189. The next prime is 102020221231. The reversal of 102020221201 is 102122020201.

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., 63895706176 + 38124515025 = 252776^2 + 195255^2 .

It is a cyclic number.

It is not a de Polignac number, because 102020221201 - 2⁷ = 102020221073 is a prime.

It is not a weakly prime, because it can be changed into another prime (102020221231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010110600 + 51010110601.

It is an arithmetic number, because the mean of its divisors is an integer number (51010110601).

Almost surely, 2^102020221201 is an apocalyptic number.

It is an amenable number.

102020221201 is a deficient number, since it is larger than the sum of its proper divisors (1).

102020221201 is an equidigital number, since it uses as much as digits as its factorization.

102020221201 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.

Adding to 102020221201 its reverse (102122020201), we get a palindrome (204142241402).

The spelling of 102020221201 in words is "one hundred two billion, twenty million, two hundred twenty-one thousand, two hundred one".