20000121122122 has 16 divisors (see below), whose sum is σ = 31786759926792. Its totient is φ = 9405344171520.

The previous prime is 20000121122119. The next prime is 20000121122129. The reversal of 20000121122122 is 22122112100002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17050036630561 + 2950084491561 = 4129169^2 + 1717581^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20000121122096 and 20000121122105.

It is not an unprimeable number, because it can be changed into a prime (20000121122129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202372779 + ... + 202471582.

Almost surely, 2^{20000121122122} is an apocalyptic number.

20000121122122 is a deficient number, since it is larger than the sum of its proper divisors (11786638804670).

20000121122122 is a wasteful number, since it uses less digits than its factorization.

20000121122122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404845833.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20000121122122 its reverse (22122112100002), we get a palindrome (42122233222124).

The spelling of 20000121122122 in words is "twenty trillion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred twenty-two".