200101122100021 has 2 divisors, whose sum is σ = 200101122100022. Its totient is φ = 200101122100020.

The previous prime is 200101122100003. The next prime is 200101122100067. The reversal of 200101122100021 is 120001221101002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119710710855121 + 80390411244900 = 10941239^2 + 8966070^2 .

It is a cyclic number.

It is not a de Polignac number, because 200101122100021 - 2⁹ = 200101122099509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200101122099974 and 200101122100010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200101122100721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100050561050010 + 100050561050011.

It is an arithmetic number, because the mean of its divisors is an integer number (100050561050011).

Almost surely, 2^{200101122100021} is an apocalyptic number.

It is an amenable number.

200101122100021 is a deficient number, since it is larger than the sum of its proper divisors (1).

200101122100021 is an equidigital number, since it uses as much as digits as its factorization.

200101122100021 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 200101122100021 its reverse (120001221101002), we get a palindrome (320102343201023).

The spelling of 200101122100021 in words is "two hundred trillion, one hundred one billion, one hundred twenty-two million, one hundred thousand, twenty-one".