20112000121 has 4 divisors (see below), whose sum is σ = 20156009332. Its totient is φ = 20067990912.

The previous prime is 20112000091. The next prime is 20112000133. The reversal of 20112000121 is 12100021102.

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 11339055225 + 8772944896 = 106485^2 + 93664^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112000121 - 2⁵ = 20112000089 is a prime.

It is a super-3 number, since 3×20112000121³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20112000098 and 20112000107.

It is not an unprimeable number, because it can be changed into a prime (20112000191) 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, 22003920 + ... + 22004833.

It is an arithmetic number, because the mean of its divisors is an integer number (5039002333).

Almost surely, 2^20112000121 is an apocalyptic number.

It is an amenable number.

20112000121 is a deficient number, since it is larger than the sum of its proper divisors (44009211).

20112000121 is an equidigital number, since it uses as much as digits as its factorization.

20112000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44009210.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20112000121 its reverse (12100021102), we get a palindrome (32212021223).

The spelling of 20112000121 in words is "twenty billion, one hundred twelve million, one hundred twenty-one", and thus it is an aban number.