2123212130321 has 8 divisors (see below), whose sum is σ = 2235085485600. Its totient is φ = 2011351309920.

The previous prime is 2123212130279. The next prime is 2123212130329. The reversal of 2123212130321 is 1230312123212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2123212130321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123212130329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2785031 + ... + 3464508.

It is an arithmetic number, because the mean of its divisors is an integer number (279385685700).

Almost surely, 2^{2123212130321} is an apocalyptic number.

It is an amenable number.

2123212130321 is a deficient number, since it is larger than the sum of its proper divisors (111873355279).

2123212130321 is a wasteful number, since it uses less digits than its factorization.

2123212130321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6267439.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 2123212130321 its reverse (1230312123212), we get a palindrome (3353524253533).

The spelling of 2123212130321 in words is "two trillion, one hundred twenty-three billion, two hundred twelve million, one hundred thirty thousand, three hundred twenty-one".