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BaseRepresentation
bin11001010010010…
…11011000101101
3112210010212111021
430221023120231
5413300334013
633014254141
75153666650
oct1451133055
9483125437
10212121133
11a9811824
125b057351
1334c3c483
1420259897
1513950a8d
hexca4b62d

212121133 has 8 divisors (see below), whose sum is σ = 242591040. Its totient is φ = 181692960.

The previous prime is 212121113. The next prime is 212121139. The reversal of 212121133 is 331121212.

212121133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 212121133 - 217 = 211990061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121139) 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, 1353 + ... + 20641.

It is an arithmetic number, because the mean of its divisors is an integer number (30323880).

Almost surely, 2212121133 is an apocalyptic number.

It is an amenable number.

212121133 is a deficient number, since it is larger than the sum of its proper divisors (30469907).

212121133 is a wasteful number, since it uses less digits than its factorization.

212121133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20867.

The product of its digits is 72, while the sum is 16.

The square root of 212121133 is about 14564.3789088310. The cubic root of 212121133 is about 596.3867407566.

Adding to 212121133 its reverse (331121212), we get a palindrome (543242345).

The spelling of 212121133 in words is "two hundred twelve million, one hundred twenty-one thousand, one hundred thirty-three".