212023031321 has 4 divisors (see below), whose sum is σ = 212036802852. Its totient is φ = 212009259792.

The previous prime is 212023031293. The next prime is 212023031371. The reversal of 212023031321 is 123130320212.

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 69187411225 + 142835620096 = 263035^2 + 377936^2 .

It is a cyclic number.

It is not a de Polignac number, because 212023031321 - 2⁶ = 212023031257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212023031293 and 212023031302.

It is not an unprimeable number, because it can be changed into a prime (212023031371) 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, 6862646 + ... + 6893471.

It is an arithmetic number, because the mean of its divisors is an integer number (53009200713).

Almost surely, 2^212023031321 is an apocalyptic number.

It is an amenable number.

212023031321 is a deficient number, since it is larger than the sum of its proper divisors (13771531).

212023031321 is a wasteful number, since it uses less digits than its factorization.

212023031321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13771530.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 212023031321 its reverse (123130320212), we get a palindrome (335153351533).

The spelling of 212023031321 in words is "two hundred twelve billion, twenty-three million, thirty-one thousand, three hundred twenty-one".