20000121202101 has 32 divisors (see below), whose sum is σ = 27824340918528. Its totient is φ = 12767690534400.

The previous prime is 20000121202013. The next prime is 20000121202111. The reversal of 20000121202101 is 10120212100002.

It is not a de Polignac number, because 20000121202101 - 2⁹ = 20000121201589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000121202111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3469000 + ... + 7213473.

It is an arithmetic number, because the mean of its divisors is an integer number (869510653704).

Almost surely, 2^{20000121202101} is an apocalyptic number.

It is an amenable number.

20000121202101 is a deficient number, since it is larger than the sum of its proper divisors (7824219716427).

20000121202101 is a wasteful number, since it uses less digits than its factorization.

20000121202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10682781.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20000121202101 its reverse (10120212100002), we get a palindrome (30120333302103).

The spelling of 20000121202101 in words is "twenty trillion, one hundred twenty-one million, two hundred two thousand, one hundred one".