103212320321 has 4 divisors (see below), whose sum is σ = 112595258544. Its totient is φ = 93829382100.

The previous prime is 103212320279. The next prime is 103212320447. The reversal of 103212320321 is 123023212301.

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, and also an emirpimes, since its reverse is a distinct semiprime: 123023212301 = 11 ⋅11183928391.

It is a cyclic number.

It is not a de Polignac number, because 103212320321 - 2¹⁸ = 103212058177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103212320293 and 103212320302.

It is not an unprimeable number, because it can be changed into a prime (103212320521) 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, 4691469095 + ... + 4691469116.

It is an arithmetic number, because the mean of its divisors is an integer number (28148814636).

Almost surely, 2^103212320321 is an apocalyptic number.

103212320321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

103212320321 is a deficient number, since it is larger than the sum of its proper divisors (9382938223).

103212320321 is an equidigital number, since it uses as much as digits as its factorization.

103212320321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9382938222.

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

Adding to 103212320321 its reverse (123023212301), we get a palindrome (226235532622).

The spelling of 103212320321 in words is "one hundred three billion, two hundred twelve million, three hundred twenty thousand, three hundred twenty-one".