212023321121 has 4 divisors (see below), whose sum is σ = 212026375044. Its totient is φ = 212020267200.

The previous prime is 212023321117. The next prime is 212023321217. The reversal of 212023321121 is 121123320212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 188237970496 + 23785350625 = 433864^2 + 154225^2 .

It is a cyclic number.

It is not a de Polignac number, because 212023321121 - 2² = 212023321117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212023321093 and 212023321102.

It is not an unprimeable number, because it can be changed into a prime (212023320121) 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, 1420340 + ... + 1562501.

It is an arithmetic number, because the mean of its divisors is an integer number (53006593761).

Almost surely, 2^212023321121 is an apocalyptic number.

It is an amenable number.

212023321121 is a deficient number, since it is larger than the sum of its proper divisors (3053923).

212023321121 is an equidigital number, since it uses as much as digits as its factorization.

212023321121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3053922.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 212023321121 its reverse (121123320212), we get a palindrome (333146641333).

Subtracting from 212023321121 its reverse (121123320212), we obtain a palindrome (90900000909).

The spelling of 212023321121 in words is "two hundred twelve billion, twenty-three million, three hundred twenty-one thousand, one hundred twenty-one".