212121201112 has 64 divisors (see below), whose sum is σ = 411909170400. Its totient is φ = 102337920000.

The previous prime is 212121201101. The next prime is 212121201113. The reversal of 212121201112 is 211102121212.

It is a super-2 number, since 2×212121201112² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121201113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36139714 + ... + 36145582.

Almost surely, 2^212121201112 is an apocalyptic number.

It is an amenable number.

212121201112 is a deficient number, since it is larger than the sum of its proper divisors (199787969288).

212121201112 is a wasteful number, since it uses less digits than its factorization.

212121201112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7108 (or 7104 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212121201112 its reverse (211102121212), we get a palindrome (423223322324).

The spelling of 212121201112 in words is "two hundred twelve billion, one hundred twenty-one million, two hundred one thousand, one hundred twelve".