2121020012 has 12 divisors (see below), whose sum is σ = 3720863160. Its totient is φ = 1057916256.

The previous prime is 2121019997. The next prime is 2121020039. The reversal of 2121020012 is 2100201212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2121019975 and 2121020002.

It is an unprimeable number.

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, 646598 + ... + 649869.

It is an arithmetic number, because the mean of its divisors is an integer number (310071930).

Almost surely, 2^2121020012 is an apocalyptic number.

It is an amenable number.

2121020012 is a deficient number, since it is larger than the sum of its proper divisors (1599843148).

2121020012 is a wasteful number, since it uses less digits than its factorization.

2121020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296880 (or 1296878 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2121020012 is about 46054.5330233626. The cubic root of 2121020012 is about 1284.8376529344.

Adding to 2121020012 its reverse (2100201212), we get a palindrome (4221221224).

The spelling of 2121020012 in words is "two billion, one hundred twenty-one million, twenty thousand, twelve".