201221013337 has 2 divisors, whose sum is σ = 201221013338. Its totient is φ = 201221013336.

The previous prime is 201221013319. The next prime is 201221013373. The reversal of 201221013337 is 733310122102.

It is a happy number.

Together with next prime (201221013373) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154086866521 + 47134146816 = 392539^2 + 217104^2 .

It is a cyclic number.

It is not a de Polignac number, because 201221013337 - 2²³ = 201212624729 is a prime.

It is not a weakly prime, because it can be changed into another prime (201221023337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610506668 + 100610506669.

It is an arithmetic number, because the mean of its divisors is an integer number (100610506669).

Almost surely, 2^201221013337 is an apocalyptic number.

It is an amenable number.

201221013337 is a deficient number, since it is larger than the sum of its proper divisors (1).

201221013337 is an equidigital number, since it uses as much as digits as its factorization.

201221013337 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

Adding to 201221013337 its reverse (733310122102), we get a palindrome (934531135439).

The spelling of 201221013337 in words is "two hundred one billion, two hundred twenty-one million, thirteen thousand, three hundred thirty-seven".