221200001221013 has 4 divisors (see below), whose sum is σ = 222081276126528. Its totient is φ = 220318726315500.

The previous prime is 221200001221007. The next prime is 221200001221027. The reversal of 221200001221013 is 310122100002122.

221200001221013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221200001221013 - 2⁴ = 221200001220997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221200001220982 and 221200001221000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221200001221093) 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, 440637452381 + ... + 440637452882.

It is an arithmetic number, because the mean of its divisors is an integer number (55520319031632).

Almost surely, 2^{221200001221013} is an apocalyptic number.

It is an amenable number.

221200001221013 is a deficient number, since it is larger than the sum of its proper divisors (881274905515).

221200001221013 is an equidigital number, since it uses as much as digits as its factorization.

221200001221013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881274905514.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221200001221013 its reverse (310122100002122), we get a palindrome (531322101223135).

The spelling of 221200001221013 in words is "two hundred twenty-one trillion, two hundred billion, one million, two hundred twenty-one thousand, thirteen".