200101212121 has 2 divisors, whose sum is σ = 200101212122. Its totient is φ = 200101212120.

The previous prime is 200101212109. The next prime is 200101212127. The reversal of 200101212121 is 121212101002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191384375625 + 8716836496 = 437475^2 + 93364^2 .

It is a cyclic number.

It is not a de Polignac number, because 200101212121 - 2⁵ = 200101212089 is a prime.

It is not a weakly prime, because it can be changed into another prime (200101212127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100050606060 + 100050606061.

It is an arithmetic number, because the mean of its divisors is an integer number (100050606061).

Almost surely, 2^200101212121 is an apocalyptic number.

It is an amenable number.

200101212121 is a deficient number, since it is larger than the sum of its proper divisors (1).

200101212121 is an equidigital number, since it uses as much as digits as its factorization.

200101212121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 200101212121 its reverse (121212101002), we get a palindrome (321313313123).

The spelling of 200101212121 in words is "two hundred billion, one hundred one million, two hundred twelve thousand, one hundred twenty-one".