20002000001121 has 6 divisors (see below), whose sum is σ = 28891777779410. Its totient is φ = 13334666667408.

The previous prime is 20002000001099. The next prime is 20002000001129. The reversal of 20002000001121 is 12110000020002.

It can be written as a sum of positive squares in only one way, i.e., 12609778550625 + 7392221450496 = 3551025^2 + 2718864^2 .

It is not a de Polignac number, because 20002000001121 - 2³⁸ = 19727122094177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 2222444444569 = 20002000001121 / (2 + 0 + 0 + 0 + 2 + 0 + 0 + 0 + 0 + 0 + 1 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20002000001129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1111222222276 + ... + 1111222222293.

Almost surely, 2^{20002000001121} is an apocalyptic number.

It is an amenable number.

20002000001121 is a deficient number, since it is larger than the sum of its proper divisors (8889777778289).

20002000001121 is a wasteful number, since it uses less digits than its factorization.

20002000001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222444444575 (or 2222444444572 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20002000001121 its reverse (12110000020002), we get a palindrome (32112000021123).

The spelling of 20002000001121 in words is "twenty trillion, two billion, one thousand, one hundred twenty-one".