200121021000101 has 4 divisors (see below), whose sum is σ = 200195332559052. Its totient is φ = 200046709441152.

The previous prime is 200121021000073. The next prime is 200121021000157. The reversal of 200121021000101 is 101000120121002.

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 39142528447201 + 160978492552900 = 6256399^2 + 12687730^2 .

It is a cyclic number.

It is not a de Polignac number, because 200121021000101 - 2¹⁴ = 200121020983717 is a prime.

It is a super-2 number, since 2×200121021000101² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121021000161) 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, 37155775436 + ... + 37155780821.

It is an arithmetic number, because the mean of its divisors is an integer number (50048833139763).

Almost surely, 2^{200121021000101} is an apocalyptic number.

It is an amenable number.

200121021000101 is a deficient number, since it is larger than the sum of its proper divisors (74311558951).

200121021000101 is an equidigital number, since it uses as much as digits as its factorization.

200121021000101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74311558950.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 200121021000101 its reverse (101000120121002), we get a palindrome (301121141121103).

The spelling of 200121021000101 in words is "two hundred trillion, one hundred twenty-one billion, twenty-one million, one hundred one", and thus it is an aban number.