202120312 has 16 divisors (see below), whose sum is σ = 385399800. Its totient is φ = 99347040.

The previous prime is 202120273. The next prime is 202120313. The reversal of 202120312 is 213021202.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 202120292 and 202120301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202120313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213639 + ... + 214582.

Almost surely, 2^202120312 is an apocalyptic number.

It is an amenable number.

202120312 is a deficient number, since it is larger than the sum of its proper divisors (183279488).

202120312 is a wasteful number, since it uses less digits than its factorization.

202120312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428286 (or 428282 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 202120312 is about 14216.9023348970. The cubic root of 202120312 is about 586.8628972240.

Adding to 202120312 its reverse (213021202), we get a palindrome (415141514).

The spelling of 202120312 in words is "two hundred two million, one hundred twenty thousand, three hundred twelve".