2121101212 has 24 divisors (see below), whose sum is σ = 3779596800. Its totient is φ = 1041261936.

The previous prime is 2121101197. The next prime is 2121101261. The reversal of 2121101212 is 2121011212.

It is a junction number, because it is equal to n+sod(n) for n = 2121101192 and 2121101201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197493 + ... + 207955.

It is an arithmetic number, because the mean of its divisors is an integer number (157483200).

Almost surely, 2^2121101212 is an apocalyptic number.

It is an amenable number.

2121101212 is a deficient number, since it is larger than the sum of its proper divisors (1658495588).

2121101212 is a wasteful number, since it uses less digits than its factorization.

2121101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11385 (or 11383 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 2121101212 is about 46055.4145785270. The cubic root of 2121101212 is about 1284.8540487385.

Adding to 2121101212 its reverse (2121011212), we get a palindrome (4242112424).

Subtracting from 2121101212 its reverse (2121011212), we obtain a square (90000 = 300²).

The spelling of 2121101212 in words is "two billion, one hundred twenty-one million, one hundred one thousand, two hundred twelve".