201212023321 has 4 divisors (see below), whose sum is σ = 201718855012. Its totient is φ = 200705191632.

The previous prime is 201212023303. The next prime is 201212023393. The reversal of 201212023321 is 123320212102.

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 130769024400 + 70442998921 = 361620^2 + 265411^2 .

It is a cyclic number.

It is not a de Polignac number, because 201212023321 - 2²⁵ = 201178468889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201212063321) 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, 253415250 + ... + 253416043.

It is an arithmetic number, because the mean of its divisors is an integer number (50429713753).

Almost surely, 2^201212023321 is an apocalyptic number.

It is an amenable number.

201212023321 is a deficient number, since it is larger than the sum of its proper divisors (506831691).

201212023321 is an equidigital number, since it uses as much as digits as its factorization.

201212023321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506831690.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 201212023321 its reverse (123320212102), we get a palindrome (324532235423).

The spelling of 201212023321 in words is "two hundred one billion, two hundred twelve million, twenty-three thousand, three hundred twenty-one".