212211213121 has 4 divisors (see below), whose sum is σ = 212217048000. Its totient is φ = 212205378244.

The previous prime is 212211213119. The next prime is 212211213139. The reversal of 212211213121 is 121312112212.

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 212211213121 - 2¹ = 212211213119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212211213191) 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, 2862541 + ... + 2935738.

It is an arithmetic number, because the mean of its divisors is an integer number (53054262000).

Almost surely, 2^212211213121 is an apocalyptic number.

It is an amenable number.

212211213121 is a deficient number, since it is larger than the sum of its proper divisors (5834879).

212211213121 is an equidigital number, since it uses as much as digits as its factorization.

212211213121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5834878.

The product of its digits is 96, while the sum is 19.

Adding to 212211213121 its reverse (121312112212), we get a palindrome (333523325333).

The spelling of 212211213121 in words is "two hundred twelve billion, two hundred eleven million, two hundred thirteen thousand, one hundred twenty-one".