212121002111 has 8 divisors (see below), whose sum is σ = 224243575920. Its totient is φ = 200094259392.

The previous prime is 212121002087. The next prime is 212121002143. The reversal of 212121002111 is 111200121212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212121002111 - 2¹⁰ = 212121001087 is a prime.

It is a super-3 number, since 3×212121002111³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121002161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23953220 + ... + 23962073.

It is an arithmetic number, because the mean of its divisors is an integer number (28030446990).

Almost surely, 2^212121002111 is an apocalyptic number.

212121002111 is a deficient number, since it is larger than the sum of its proper divisors (12122573809).

212121002111 is a wasteful number, since it uses less digits than its factorization.

212121002111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47915545.

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

Adding to 212121002111 its reverse (111200121212), we get a palindrome (323321123323).

The spelling of 212121002111 in words is "two hundred twelve billion, one hundred twenty-one million, two thousand, one hundred eleven".