212210302121 has 4 divisors (see below), whose sum is σ = 213055761744. Its totient is φ = 211364842500.

The previous prime is 212210302103. The next prime is 212210302123. The reversal of 212210302121 is 121203012212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212210302121 - 2²⁶ = 212143193257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212210302121.

It is not an unprimeable number, because it can be changed into a prime (212210302123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422729435 + ... + 422729936.

It is an arithmetic number, because the mean of its divisors is an integer number (53263940436).

Almost surely, 2^212210302121 is an apocalyptic number.

It is an amenable number.

212210302121 is a deficient number, since it is larger than the sum of its proper divisors (845459623).

212210302121 is an equidigital number, since it uses as much as digits as its factorization.

212210302121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845459622.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 212210302121 its reverse (121203012212), we get a palindrome (333413314333).

The spelling of 212210302121 in words is "two hundred twelve billion, two hundred ten million, three hundred two thousand, one hundred twenty-one".