13021221232123 has 8 divisors (see below), whose sum is σ = 14022993348000. Its totient is φ = 12019469075328.

The previous prime is 13021221232121. The next prime is 13021221232163. The reversal of 13021221232123 is 32123212212031.

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

It is not a de Polignac number, because 13021221232123 - 2¹ = 13021221232121 is a prime.

It is a super-3 number, since 3×13021221232123³ (a number of 40 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (13021221232121) 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, 3620878 + ... + 6257251.

It is an arithmetic number, because the mean of its divisors is an integer number (1752874168500).

Almost surely, 2^{13021221232123} is an apocalyptic number.

13021221232123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13021221232123 is a deficient number, since it is larger than the sum of its proper divisors (1001772115877).

13021221232123 is a wasteful number, since it uses less digits than its factorization.

13021221232123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9979541.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 13021221232123 its reverse (32123212212031), we get a palindrome (45144433444154).

The spelling of 13021221232123 in words is "thirteen trillion, twenty-one billion, two hundred twenty-one million, two hundred thirty-two thousand, one hundred twenty-three".