2120021212 has 12 divisors (see below), whose sum is σ = 3714273640. Its totient is φ = 1058800176.

The previous prime is 2120021179. The next prime is 2120021237. The reversal of 2120021212 is 2121200212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2120021192 and 2120021201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298662 + ... + 305677.

Almost surely, 2^2120021212 is an apocalyptic number.

It is an amenable number.

2120021212 is a deficient number, since it is larger than the sum of its proper divisors (1594252428).

2120021212 is a wasteful number, since it uses less digits than its factorization.

2120021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605220 (or 605218 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2120021212 is about 46043.6880799095. The cubic root of 2120021212 is about 1284.6359422275.

Adding to 2120021212 its reverse (2121200212), we get a palindrome (4241221424).

The spelling of 2120021212 in words is "two billion, one hundred twenty million, twenty-one thousand, two hundred twelve".