212321121 has 8 divisors (see below), whose sum is σ = 283936224. Its totient is φ = 141126720.

The previous prime is 212321113. The next prime is 212321129. The reversal of 212321121 is 121123212.

212321121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212321113) and next prime (212321129).

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

It is not a de Polignac number, because 212321121 - 2³ = 212321113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212321121.

It is not an unprimeable number, because it can be changed into a prime (212321129) 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, 103995 + ... + 106016.

It is an arithmetic number, because the mean of its divisors is an integer number (35492028).

Almost surely, 2^212321121 is an apocalyptic number.

It is an amenable number.

212321121 is a deficient number, since it is larger than the sum of its proper divisors (71615103).

212321121 is a wasteful number, since it uses less digits than its factorization.

212321121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210351.

The product of its digits is 48, while the sum is 15.

The square root of 212321121 is about 14571.2429462967. The cubic root of 212321121 is about 596.5741065427.

Adding to 212321121 its reverse (121123212), we get a palindrome (333444333).

The spelling of 212321121 in words is "two hundred twelve million, three hundred twenty-one thousand, one hundred twenty-one".