1002201221993 has 2 divisors, whose sum is σ = 1002201221994. Its totient is φ = 1002201221992.

The previous prime is 1002201221971. The next prime is 1002201222013. The reversal of 1002201221993 is 3991221022001.

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., 780559881049 + 221641340944 = 883493^2 + 470788^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002201221993 - 2⁶ = 1002201221929 is a prime.

It is not a weakly prime, because it can be changed into another prime (1002201221893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501100610996 + 501100610997.

It is an arithmetic number, because the mean of its divisors is an integer number (501100610997).

Almost surely, 2^{1002201221993} is an apocalyptic number.

It is an amenable number.

1002201221993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002201221993 is an equidigital number, since it uses as much as digits as its factorization.

1002201221993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

Adding to 1002201221993 its reverse (3991221022001), we get a palindrome (4993422243994).

The spelling of 1002201221993 in words is "one trillion, two billion, two hundred one million, two hundred twenty-one thousand, nine hundred ninety-three".