202121201212 has 48 divisors (see below), whose sum is σ = 408909993408. Its totient is φ = 85625971200.

The previous prime is 202121201171. The next prime is 202121201287. The reversal of 202121201212 is 212102121202.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1686958 + ... + 1802794.

It is an arithmetic number, because the mean of its divisors is an integer number (8518958196).

Almost surely, 2^202121201212 is an apocalyptic number.

It is an amenable number.

202121201212 is an abundant number, since it is smaller than the sum of its proper divisors (206788792196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202121201212 is a wasteful number, since it uses less digits than its factorization.

202121201212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116566 (or 116564 counting only the distinct ones).

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

Adding to 202121201212 its reverse (212102121202), we get a palindrome (414223322414).

The spelling of 202121201212 in words is "two hundred two billion, one hundred twenty-one million, two hundred one thousand, two hundred twelve".