202121211212 has 24 divisors (see below), whose sum is σ = 363775292496. Its totient is φ = 98209274688.

The previous prime is 202121211209. The next prime is 202121211217. The reversal of 202121211212 is 212112121202.

202121211212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (202121211217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2948663 + ... + 3016430.

It is an arithmetic number, because the mean of its divisors is an integer number (15157303854).

Almost surely, 2^202121211212 is an apocalyptic number.

It is an amenable number.

202121211212 is a deficient number, since it is larger than the sum of its proper divisors (161654081284).

202121211212 is a wasteful number, since it uses less digits than its factorization.

202121211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5965337 (or 5965335 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 202121211212 its reverse (212112121202), we get a palindrome (414233332414).

The spelling of 202121211212 in words is "two hundred two billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twelve".