200101122221981 has 2 divisors, whose sum is σ = 200101122221982. Its totient is φ = 200101122221980.

The previous prime is 200101122221929. The next prime is 200101122222139. The reversal of 200101122221981 is 189122221101002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180959263452100 + 19141858769881 = 13452110^2 + 4375141^2 .

It is a cyclic number.

It is not a de Polignac number, because 200101122221981 - 2⁴⁶ = 129732378044317 is a prime.

It is a super-2 number, since 2×200101122221981² (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 (200101122221881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100050561110990 + 100050561110991.

It is an arithmetic number, because the mean of its divisors is an integer number (100050561110991).

Almost surely, 2^{200101122221981} is an apocalyptic number.

It is an amenable number.

200101122221981 is a deficient number, since it is larger than the sum of its proper divisors (1).

200101122221981 is an equidigital number, since it uses as much as digits as its factorization.

200101122221981 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 200101122221981 its reverse (189122221101002), we get a palindrome (389223343322983).

The spelling of 200101122221981 in words is "two hundred trillion, one hundred one billion, one hundred twenty-two million, two hundred twenty-one thousand, nine hundred eighty-one".