200010121081 has 2 divisors, whose sum is σ = 200010121082. Its totient is φ = 200010121080.

The previous prime is 200010121079. The next prime is 200010121111. The reversal of 200010121081 is 180121010002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139129000000 + 60881121081 = 373000^2 + 246741^2 .

It is a cyclic number.

It is not a de Polignac number, because 200010121081 - 2¹ = 200010121079 is a prime.

It is a super-2 number, since 2×200010121081² (a number of 23 digits) contains 22 as substring.

Together with 200010121079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (200010128081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100005060540 + 100005060541.

It is an arithmetic number, because the mean of its divisors is an integer number (100005060541).

Almost surely, 2^200010121081 is an apocalyptic number.

It is an amenable number.

200010121081 is a deficient number, since it is larger than the sum of its proper divisors (1).

200010121081 is an equidigital number, since it uses as much as digits as its factorization.

200010121081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 200010121081 its reverse (180121010002), we get a palindrome (380131131083).

The spelling of 200010121081 in words is "two hundred billion, ten million, one hundred twenty-one thousand, eighty-one".