212121001112 has 8 divisors (see below), whose sum is σ = 397726877100. Its totient is φ = 106060500552.

The previous prime is 212121001087. The next prime is 212121001117. The reversal of 212121001112 is 211100121212.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×212121001112³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121001117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13257562562 + ... + 13257562577.

Almost surely, 2^212121001112 is an apocalyptic number.

It is an amenable number.

212121001112 is a deficient number, since it is larger than the sum of its proper divisors (185605875988).

212121001112 is a wasteful number, since it uses less digits than its factorization.

212121001112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26515125145 (or 26515125141 counting only the distinct ones).

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

Adding to 212121001112 its reverse (211100121212), we get a palindrome (423221122324).

The spelling of 212121001112 in words is "two hundred twelve billion, one hundred twenty-one million, one thousand, one hundred twelve".