212303121 has 8 divisors (see below), whose sum is σ = 283172544. Its totient is φ = 141484560.

The previous prime is 212303071. The next prime is 212303137. The reversal of 212303121 is 121303212.

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

It is not a de Polignac number, because 212303121 - 2¹¹ = 212301073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212303121.

It is not an unprimeable number, because it can be changed into a prime (212303141) 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, 1581 + ... + 20666.

It is an arithmetic number, because the mean of its divisors is an integer number (35396568).

Almost surely, 2^212303121 is an apocalyptic number.

It is an amenable number.

212303121 is a deficient number, since it is larger than the sum of its proper divisors (70869423).

212303121 is a wasteful number, since it uses less digits than its factorization.

212303121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25431.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 212303121 is about 14570.6252782782. The cubic root of 212303121 is about 596.5572474295.

Adding to 212303121 its reverse (121303212), we get a palindrome (333606333).

Subtracting from 212303121 its reverse (121303212), we obtain a palindrome (90999909).

The spelling of 212303121 in words is "two hundred twelve million, three hundred three thousand, one hundred twenty-one".