202123212 has 12 divisors (see below), whose sum is σ = 471620856. Its totient is φ = 67374400.

The previous prime is 202123199. The next prime is 202123223. The reversal of 202123212 is 212321202.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 202123191 and 202123200.

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, 8421789 + ... + 8421812.

It is an arithmetic number, because the mean of its divisors is an integer number (39301738).

Almost surely, 2^202123212 is an apocalyptic number.

It is an amenable number.

202123212 is an abundant number, since it is smaller than the sum of its proper divisors (269497644).

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

202123212 is a wasteful number, since it uses less digits than its factorization.

202123212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16843608 (or 16843606 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 202123212 is about 14217.0043258065. The cubic root of 202123212 is about 586.8657039587.

Adding to 202123212 its reverse (212321202), we get a palindrome (414444414).

The spelling of 202123212 in words is "two hundred two million, one hundred twenty-three thousand, two hundred twelve".