13233112021221 has 16 divisors (see below), whose sum is σ = 17686074663936. Its totient is φ = 8801120257776.

The previous prime is 13233112021187. The next prime is 13233112021249. The reversal of 13233112021221 is 12212021133231.

It is a de Polignac number, because none of the positive numbers 2^k-13233112021221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13233112021191 and 13233112021200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13233112021291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5423166 + ... + 7475088.

It is an arithmetic number, because the mean of its divisors is an integer number (1105379666496).

Almost surely, 2^{13233112021221} is an apocalyptic number.

It is an amenable number.

13233112021221 is a deficient number, since it is larger than the sum of its proper divisors (4452962642715).

13233112021221 is a wasteful number, since it uses less digits than its factorization.

13233112021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057032.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 13233112021221 its reverse (12212021133231), we get a palindrome (25445133154452).

The spelling of 13233112021221 in words is "thirteen trillion, two hundred thirty-three billion, one hundred twelve million, twenty-one thousand, two hundred twenty-one".