212121010100112 has 80 divisors (see below), whose sum is σ = 564821259250752. Its totient is φ = 68547642094080.

The previous prime is 212121010100047. The next prime is 212121010100179. The reversal of 212121010100112 is 211001010121212.

It is a happy number.

It is a super-3 number, since 3×212121010100112³ (a number of 44 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212121010100091 and 212121010100100.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215099214 + ... + 216083117.

Almost surely, 2^{212121010100112} is an apocalyptic number.

It is an amenable number.

212121010100112 is an abundant number, since it is smaller than the sum of its proper divisors (352700249150640).

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

212121010100112 is a wasteful number, since it uses less digits than its factorization.

212121010100112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431182656 (or 431182650 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 212121010100112 its reverse (211001010121212), we get a palindrome (423122020221324).

The spelling of 212121010100112 in words is "two hundred twelve trillion, one hundred twenty-one billion, ten million, one hundred thousand, one hundred twelve".