202121212112 has 10 divisors (see below), whose sum is σ = 391609848498. Its totient is φ = 101060606048.

The previous prime is 202121212091. The next prime is 202121212121. The reversal of 202121212112 is 211212121202.

It can be written as a sum of positive squares in only one way, i.e., 163148135056 + 38973077056 = 403916^2 + 197416^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6316287863 + ... + 6316287894.

Almost surely, 2^202121212112 is an apocalyptic number.

It is an amenable number.

202121212112 is a deficient number, since it is larger than the sum of its proper divisors (189488636386).

202121212112 is a wasteful number, since it uses less digits than its factorization.

202121212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12632575765 (or 12632575759 counting only the distinct ones).

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

Adding to 202121212112 its reverse (211212121202), we get a palindrome (413333333314).

The spelling of 202121212112 in words is "two hundred two billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twelve".