212121202 has 4 divisors (see below), whose sum is σ = 318181806. Its totient is φ = 106060600.

The previous prime is 212121197. The next prime is 212121209. The reversal of 212121202 is 202121212.

It is a happy number.

212121202 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 193794241 + 18326961 = 13921^2 + 4281^2 .

It is not an unprimeable number, because it can be changed into a prime (212121209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53030299 + ... + 53030302.

Almost surely, 2^212121202 is an apocalyptic number.

212121202 is a deficient number, since it is larger than the sum of its proper divisors (106060604).

212121202 is a wasteful number, since it uses less digits than its factorization.

212121202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106060603.

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

The square root of 212121202 is about 14564.3812776238. The cubic root of 212121202 is about 596.3868054220.

Adding to 212121202 its reverse (202121212), we get a palindrome (414242414).

The spelling of 212121202 in words is "two hundred twelve million, one hundred twenty-one thousand, two hundred two".