212121010112 has 56 divisors (see below), whose sum is σ = 462699274752. Its totient is φ = 95682579200.

The previous prime is 212121010043. The next prime is 212121010133. The reversal of 212121010112 is 211010121212.

It is a super-3 number, since 3×212121010112³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1057808 + ... + 1242255.

Almost surely, 2^212121010112 is an apocalyptic number.

212121010112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

212121010112 is an abundant number, since it is smaller than the sum of its proper divisors (250578264640).

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

212121010112 is a wasteful number, since it uses less digits than its factorization.

212121010112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300217 (or 2300207 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212121010112 its reverse (211010121212), we get a palindrome (423131131324).

Subtracting from 212121010112 its reverse (211010121212), we obtain a square (1110888900 = 33330²).

The spelling of 212121010112 in words is "two hundred twelve billion, one hundred twenty-one million, ten thousand, one hundred twelve".