11211212310321 has 4 divisors (see below), whose sum is σ = 14948283080432. Its totient is φ = 7474141540212.

The previous prime is 11211212310317. The next prime is 11211212310349. The reversal of 11211212310321 is 12301321211211.

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 not a de Polignac number, because 11211212310321 - 2² = 11211212310317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211212310391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1868535385051 + ... + 1868535385056.

It is an arithmetic number, because the mean of its divisors is an integer number (3737070770108).

Almost surely, 2^{11211212310321} is an apocalyptic number.

It is an amenable number.

11211212310321 is a deficient number, since it is larger than the sum of its proper divisors (3737070770111).

11211212310321 is an equidigital number, since it uses as much as digits as its factorization.

11211212310321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3737070770110.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 11211212310321 its reverse (12301321211211), we get a palindrome (23512533521532).

The spelling of 11211212310321 in words is "eleven trillion, two hundred eleven billion, two hundred twelve million, three hundred ten thousand, three hundred twenty-one".