20121000122122 has 8 divisors (see below), whose sum is σ = 31222241568900. Its totient is φ = 9713586265824.

The previous prime is 20121000122117. The next prime is 20121000122123. The reversal of 20121000122122 is 22122100012102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19688113762641 + 432886359481 = 4437129^2 + 657941^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20121000122096 and 20121000122105.

It is not an unprimeable number, because it can be changed into a prime (20121000122123) 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 3 ways as a sum of consecutive naturals, for example, 173456897547 + ... + 173456897662.

Almost surely, 2^{20121000122122} is an apocalyptic number.

20121000122122 is a deficient number, since it is larger than the sum of its proper divisors (11101241446778).

20121000122122 is a wasteful number, since it uses less digits than its factorization.

20121000122122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346913795240.

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

Adding to 20121000122122 its reverse (22122100012102), we get a palindrome (42243100134224).

The spelling of 20121000122122 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-two thousand, one hundred twenty-two".