2123212330321 has 4 divisors (see below), whose sum is σ = 2123569839600. Its totient is φ = 2122854821044.

The previous prime is 2123212330307. The next prime is 2123212330333. The reversal of 2123212330321 is 1230332123212.

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 2123212330321 - 2⁷ = 2123212330193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123272330321) 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, 178745731 + ... + 178757608.

It is an arithmetic number, because the mean of its divisors is an integer number (530892459900).

Almost surely, 2^{2123212330321} is an apocalyptic number.

It is an amenable number.

2123212330321 is a deficient number, since it is larger than the sum of its proper divisors (357509279).

2123212330321 is an equidigital number, since it uses as much as digits as its factorization.

2123212330321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357509278.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 2123212330321 its reverse (1230332123212), we get a palindrome (3353544453533).

The spelling of 2123212330321 in words is "two trillion, one hundred twenty-three billion, two hundred twelve million, three hundred thirty thousand, three hundred twenty-one".