2121010012 has 24 divisors (see below), whose sum is σ = 4100463360. Its totient is φ = 951890160.

The previous prime is 2121010009. The next prime is 2121010013. The reversal of 2121010012 is 2100101212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121010013) 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 7 ways as a sum of consecutive naturals, for example, 301618 + ... + 308569.

It is an arithmetic number, because the mean of its divisors is an integer number (170852640).

Almost surely, 2^2121010012 is an apocalyptic number.

2121010012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2121010012 is a deficient number, since it is larger than the sum of its proper divisors (1979453348).

2121010012 is a wasteful number, since it uses less digits than its factorization.

2121010012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610281 (or 610279 counting only the distinct ones).

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

The square root of 2121010012 is about 46054.4244562887. The cubic root of 2121010012 is about 1284.8356337177.

Adding to 2121010012 its reverse (2100101212), we get a palindrome (4221111224).

The spelling of 2121010012 in words is "two billion, one hundred twenty-one million, ten thousand, twelve".