13123000221221 has 16 divisors (see below), whose sum is σ = 14359135464960. Its totient is φ = 11894077707120.

The previous prime is 13123000221209. The next prime is 13123000221223. The reversal of 13123000221221 is 12212200032131.

It is a cyclic number.

It is not a de Polignac number, because 13123000221221 - 2³⁸ = 12848122314277 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13123000221193 and 13123000221202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123000221223) 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, 10598816 + ... + 11772038.

It is an arithmetic number, because the mean of its divisors is an integer number (897445966560).

Almost surely, 2^{13123000221221} is an apocalyptic number.

13123000221221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13123000221221 is a deficient number, since it is larger than the sum of its proper divisors (1236135243739).

13123000221221 is a wasteful number, since it uses less digits than its factorization.

13123000221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176296.

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

Adding to 13123000221221 its reverse (12212200032131), we get a palindrome (25335200253352).

The spelling of 13123000221221 in words is "thirteen trillion, one hundred twenty-three billion, two hundred twenty-one thousand, two hundred twenty-one".