202121212012 has 12 divisors (see below), whose sum is σ = 359510680816. Its totient is φ = 99403874640.

The previous prime is 202121211997. The next prime is 202121212061. The reversal of 202121212012 is 210212121202.

It is a happy 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, 414182568 + ... + 414183055.

Almost surely, 2^202121212012 is an apocalyptic number.

It is an amenable number.

202121212012 is a deficient number, since it is larger than the sum of its proper divisors (157389468804).

202121212012 is a wasteful number, since it uses less digits than its factorization.

202121212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828365688 (or 828365686 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 202121212012 its reverse (210212121202), we get a palindrome (412333333214).

The spelling of 202121212012 in words is "two hundred two billion, one hundred twenty-one million, two hundred twelve thousand, twelve".