212031021323 has 16 divisors (see below), whose sum is σ = 248362329600. Its totient is φ = 178861737600.

The previous prime is 212031021317. The next prime is 212031021331. The reversal of 212031021323 is 323120130212.

It is a cyclic number.

It is not a de Polignac number, because 212031021323 - 2²⁰ = 212029972747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212031021295 and 212031021304.

It is not an unprimeable number, because it can be changed into a prime (212031021313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7971623 + ... + 7998176.

It is an arithmetic number, because the mean of its divisors is an integer number (15522645600).

Almost surely, 2^212031021323 is an apocalyptic number.

212031021323 is a deficient number, since it is larger than the sum of its proper divisors (36331308277).

212031021323 is a wasteful number, since it uses less digits than its factorization.

212031021323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15969898.

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

Adding to 212031021323 its reverse (323120130212), we get a palindrome (535151151535).

The spelling of 212031021323 in words is "two hundred twelve billion, thirty-one million, twenty-one thousand, three hundred twenty-three".