200021485231181 has 2 divisors, whose sum is σ = 200021485231182. Its totient is φ = 200021485231180.

The previous prime is 200021485231171. The next prime is 200021485231187. The reversal of 200021485231181 is 181132584120002.

200021485231181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162428142772900 + 37593342458281 = 12744730^2 + 6131341^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200021485231181 is a prime.

It is a super-2 number, since 2×200021485231181² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200021485231187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100010742615590 + 100010742615591.

It is an arithmetic number, because the mean of its divisors is an integer number (100010742615591).

Almost surely, 2^{200021485231181} is an apocalyptic number.

It is an amenable number.

200021485231181 is a deficient number, since it is larger than the sum of its proper divisors (1).

200021485231181 is an equidigital number, since it uses as much as digits as its factorization.

200021485231181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30720, while the sum is 38.

The spelling of 200021485231181 in words is "two hundred trillion, twenty-one billion, four hundred eighty-five million, two hundred thirty-one thousand, one hundred eighty-one".