212320121 has 8 divisors (see below), whose sum is σ = 228809280. Its totient is φ = 195853392.

The previous prime is 212320081. The next prime is 212320127. The reversal of 212320121 is 121023212.

It is a happy number.

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 212320121 - 2¹⁴ = 212303737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212320096 and 212320105.

It is not an unprimeable number, because it can be changed into a prime (212320127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17660 + ... + 27138.

It is an arithmetic number, because the mean of its divisors is an integer number (28601160).

Almost surely, 2^212320121 is an apocalyptic number.

It is an amenable number.

212320121 is a deficient number, since it is larger than the sum of its proper divisors (16489159).

212320121 is a wasteful number, since it uses less digits than its factorization.

212320121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11215.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 212320121 is about 14571.2086320936. The cubic root of 212320121 is about 596.5731699503.

Adding to 212320121 its reverse (121023212), we get a palindrome (333343333).

The spelling of 212320121 in words is "two hundred twelve million, three hundred twenty thousand, one hundred twenty-one".