200211202211981 has 2 divisors, whose sum is σ = 200211202211982. Its totient is φ = 200211202211980.

The previous prime is 200211202211947. The next prime is 200211202212067. The reversal of 200211202211981 is 189112202112002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180034404936100 + 20176797275881 = 13417690^2 + 4491859^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200211202211981 is a prime.

It is a super-2 number, since 2×200211202211981² (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 (200211202214981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100105601105990 + 100105601105991.

It is an arithmetic number, because the mean of its divisors is an integer number (100105601105991).

Almost surely, 2^{200211202211981} is an apocalyptic number.

It is an amenable number.

200211202211981 is a deficient number, since it is larger than the sum of its proper divisors (1).

200211202211981 is an equidigital number, since it uses as much as digits as its factorization.

200211202211981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 32.

Adding to 200211202211981 its reverse (189112202112002), we get a palindrome (389323404323983).

The spelling of 200211202211981 in words is "two hundred trillion, two hundred eleven billion, two hundred two million, two hundred eleven thousand, nine hundred eighty-one".