212302121 has 8 divisors (see below), whose sum is σ = 222895680. Its totient is φ = 201822192.

The previous prime is 212302117. The next prime is 212302133. The reversal of 212302121 is 121203212.

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 212302121 - 2² = 212302117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212302096 and 212302105.

It is not an unprimeable number, because it can be changed into a prime (212302721) 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, 24566 + ... + 32063.

It is an arithmetic number, because the mean of its divisors is an integer number (27861960).

Almost surely, 2^212302121 is an apocalyptic number.

It is an amenable number.

212302121 is a deficient number, since it is larger than the sum of its proper divisors (10593559).

212302121 is a wasteful number, since it uses less digits than its factorization.

212302121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56815.

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

The square root of 212302121 is about 14570.5909626206. The cubic root of 212302121 is about 596.5563107842.

Adding to 212302121 its reverse (121203212), we get a palindrome (333505333).

The spelling of 212302121 in words is "two hundred twelve million, three hundred two thousand, one hundred twenty-one".