13321203212123 has 4 divisors (see below), whose sum is σ = 13326309080280. Its totient is φ = 13316097343968.

The previous prime is 13321203212117. The next prime is 13321203212197. The reversal of 13321203212123 is 32121230212331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13321203212123 is a prime.

It is a super-2 number, since 2×13321203212123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13321203212092 and 13321203212101.

It is not an unprimeable number, because it can be changed into a prime (13321203212423) 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, 2552930165 + ... + 2552935382.

It is an arithmetic number, because the mean of its divisors is an integer number (3331577270070).

Almost surely, 2^{13321203212123} is an apocalyptic number.

13321203212123 is a deficient number, since it is larger than the sum of its proper divisors (5105868157).

13321203212123 is an equidigital number, since it uses as much as digits as its factorization.

13321203212123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5105868156.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 13321203212123 its reverse (32121230212331), we get a palindrome (45442433424454).

The spelling of 13321203212123 in words is "thirteen trillion, three hundred twenty-one billion, two hundred three million, two hundred twelve thousand, one hundred twenty-three".