221000201011813 has 2 divisors, whose sum is σ = 221000201011814. Its totient is φ = 221000201011812.

The previous prime is 221000201011789. The next prime is 221000201011823. The reversal of 221000201011813 is 318110102000122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152429098903524 + 68571102108289 = 12346218^2 + 8280767^2 .

It is a cyclic number.

It is not a de Polignac number, because 221000201011813 - 2⁹ = 221000201011301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221000201011823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500100505906 + 110500100505907.

It is an arithmetic number, because the mean of its divisors is an integer number (110500100505907).

Almost surely, 2^{221000201011813} is an apocalyptic number.

It is an amenable number.

221000201011813 is a deficient number, since it is larger than the sum of its proper divisors (1).

221000201011813 is an equidigital number, since it uses as much as digits as its factorization.

221000201011813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 221000201011813 its reverse (318110102000122), we get a palindrome (539110303011935).

The spelling of 221000201011813 in words is "two hundred twenty-one trillion, two hundred one million, eleven thousand, eight hundred thirteen".