221220001013 has 16 divisors (see below), whose sum is σ = 249673786560. Its totient is φ = 194157868800.

The previous prime is 221220001003. The next prime is 221220001027. The reversal of 221220001013 is 310100022122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221220001013 - 2⁴ = 221220000997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220001003) 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, 5213981 + ... + 5256237.

It is an arithmetic number, because the mean of its divisors is an integer number (15604611660).

Almost surely, 2^221220001013 is an apocalyptic number.

It is an amenable number.

221220001013 is a deficient number, since it is larger than the sum of its proper divisors (28453785547).

221220001013 is a wasteful number, since it uses less digits than its factorization.

221220001013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58708.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 221220001013 its reverse (310100022122), we get a palindrome (531320023135).

The spelling of 221220001013 in words is "two hundred twenty-one billion, two hundred twenty million, one thousand, thirteen".