20002112121 has 8 divisors (see below), whose sum is σ = 26679523360. Its totient is φ = 13329721152.

The previous prime is 20002112111. The next prime is 20002112153. The reversal of 20002112121 is 12121120002.

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

It is not a de Polignac number, because 20002112121 - 2⁶ = 20002112057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20002112097 and 20002112106.

It is not an unprimeable number, because it can be changed into a prime (20002112101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1245760 + ... + 1261713.

It is an arithmetic number, because the mean of its divisors is an integer number (3334940420).

Almost surely, 2^20002112121 is an apocalyptic number.

It is an amenable number.

20002112121 is a deficient number, since it is larger than the sum of its proper divisors (6677411239).

20002112121 is a wasteful number, since it uses less digits than its factorization.

20002112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2510135.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20002112121 its reverse (12121120002), we get a palindrome (32123232123).

The spelling of 20002112121 in words is "twenty billion, two million, one hundred twelve thousand, one hundred twenty-one".