20200200100121 has 4 divisors (see below), whose sum is σ = 21388447164852. Its totient is φ = 19011953035392.

The previous prime is 20200200100063. The next prime is 20200200100127. The reversal of 20200200100121 is 12100100200202.

It is a happy number.

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 18079504000000 + 2120696100121 = 4252000^2 + 1456261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20200200100121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20200200100127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 594123532340 + ... + 594123532373.

It is an arithmetic number, because the mean of its divisors is an integer number (5347111791213).

Almost surely, 2^{20200200100121} is an apocalyptic number.

It is an amenable number.

20200200100121 is a deficient number, since it is larger than the sum of its proper divisors (1188247064731).

20200200100121 is a wasteful number, since it uses less digits than its factorization.

20200200100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188247064730.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20200200100121 its reverse (12100100200202), we get a palindrome (32300300300323).

The spelling of 20200200100121 in words is "twenty trillion, two hundred billion, two hundred million, one hundred thousand, one hundred twenty-one".