13212112221001 has 4 divisors (see below), whose sum is σ = 13240648100992. Its totient is φ = 13183576341012.

The previous prime is 13212112220941. The next prime is 13212112221013. The reversal of 13212112221001 is 10012221121231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13212112221001 - 2⁷ = 13212112220873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13212112221001.

It is not an unprimeable number, because it can be changed into a prime (13212112221031) 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, 14267939301 + ... + 14267940226.

It is an arithmetic number, because the mean of its divisors is an integer number (3310162025248).

Almost surely, 2^{13212112221001} is an apocalyptic number.

It is an amenable number.

13212112221001 is a deficient number, since it is larger than the sum of its proper divisors (28535879991).

13212112221001 is an equidigital number, since it uses as much as digits as its factorization.

13212112221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28535879990.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 13212112221001 its reverse (10012221121231), we get a palindrome (23224333342232).

The spelling of 13212112221001 in words is "thirteen trillion, two hundred twelve billion, one hundred twelve million, two hundred twenty-one thousand, one".