200121202110101 has 4 divisors (see below), whose sum is σ = 200183409512172. Its totient is φ = 200058994708032.

The previous prime is 200121202110091. The next prime is 200121202110113. The reversal of 200121202110101 is 101011202121002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 160091475231076 + 40029726879025 = 12652726^2 + 6326905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200121202110101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121202119101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31103696210 + ... + 31103702643.

It is an arithmetic number, because the mean of its divisors is an integer number (50045852378043).

Almost surely, 2^{200121202110101} is an apocalyptic number.

It is an amenable number.

200121202110101 is a deficient number, since it is larger than the sum of its proper divisors (62207402071).

200121202110101 is an equidigital number, since it uses as much as digits as its factorization.

200121202110101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62207402070.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 200121202110101 its reverse (101011202121002), we get a palindrome (301132404231103).

The spelling of 200121202110101 in words is "two hundred trillion, one hundred twenty-one billion, two hundred two million, one hundred ten thousand, one hundred one".