200111511441421 has 2 divisors, whose sum is σ = 200111511441422. Its totient is φ = 200111511441420.

The previous prime is 200111511441383. The next prime is 200111511441431. The reversal of 200111511441421 is 124144115111002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185706412327396 + 14405099114025 = 13627414^2 + 3795405^2 .

It is a cyclic number.

It is not a de Polignac number, because 200111511441421 - 2²¹ = 200111509344269 is a prime.

It is a super-2 number, since 2×200111511441421² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 200111511441421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200111511441431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100055755720710 + 100055755720711.

It is an arithmetic number, because the mean of its divisors is an integer number (100055755720711).

Almost surely, 2^{200111511441421} is an apocalyptic number.

It is an amenable number.

200111511441421 is a deficient number, since it is larger than the sum of its proper divisors (1).

200111511441421 is an equidigital number, since it uses as much as digits as its factorization.

200111511441421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 28.

Adding to 200111511441421 its reverse (124144115111002), we get a palindrome (324255626552423).

The spelling of 200111511441421 in words is "two hundred trillion, one hundred eleven billion, five hundred eleven million, four hundred forty-one thousand, four hundred twenty-one".