2121020312 has 16 divisors (see below), whose sum is σ = 4186224600. Its totient is φ = 1004693760.

The previous prime is 2121020281. The next prime is 2121020339. The reversal of 2121020312 is 2130201212.

It is a happy number.

It is a congruent number.

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, 6976889 + ... + 6977192.

Almost surely, 2^2121020312 is an apocalyptic number.

It is an amenable number.

2121020312 is a deficient number, since it is larger than the sum of its proper divisors (2065204288).

2121020312 is a wasteful number, since it uses less digits than its factorization.

2121020312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13954106 (or 13954102 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2121020312 is about 46054.5362803709. The cubic root of 2121020312 is about 1284.8377135108.

Adding to 2121020312 its reverse (2130201212), we get a palindrome (4251221524).

Subtracting 2121020312 from its reverse (2130201212), we obtain a square (9180900 = 3030²).

The spelling of 2121020312 in words is "two billion, one hundred twenty-one million, twenty thousand, three hundred twelve".