200121101010101 has 16 divisors (see below), whose sum is σ = 205184808436608. Its totient is φ = 195066150854400.

The previous prime is 200121101010067. The next prime is 200121101010209. The reversal of 200121101010101 is 101010101121002.

It is a cyclic number.

It is not a de Polignac number, because 200121101010101 - 2¹⁸ = 200121100747957 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 (200121101013101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282788630 + ... + 283495416.

It is an arithmetic number, because the mean of its divisors is an integer number (12824050527288).

Almost surely, 2^{200121101010101} is an apocalyptic number.

It is an amenable number.

200121101010101 is a deficient number, since it is larger than the sum of its proper divisors (5063707426507).

200121101010101 is a wasteful number, since it uses less digits than its factorization.

200121101010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712972.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 200121101010101 its reverse (101010101121002), we get a palindrome (301131202131103).

The spelling of 200121101010101 in words is "two hundred trillion, one hundred twenty-one billion, one hundred one million, ten thousand, one hundred one".