13223210001221 has 16 divisors (see below), whose sum is σ = 14733011386368. Its totient is φ = 11764717239600.

The previous prime is 13223210001121. The next prime is 13223210001271. The reversal of 13223210001221 is 12210001232231.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13223210001221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13223210001193 and 13223210001202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13223210001271) 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, 9383276 + ... + 10700106.

It is an arithmetic number, because the mean of its divisors is an integer number (920813211648).

Almost surely, 2^{13223210001221} is an apocalyptic number.

13223210001221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13223210001221 is a deficient number, since it is larger than the sum of its proper divisors (1509801385147).

13223210001221 is a wasteful number, since it uses less digits than its factorization.

13223210001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336312.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 13223210001221 its reverse (12210001232231), we get a palindrome (25433211233452).

The spelling of 13223210001221 in words is "thirteen trillion, two hundred twenty-three billion, two hundred ten million, one thousand, two hundred twenty-one".