221001321302013 has 64 divisors (see below), whose sum is σ = 341456091604992. Its totient is φ = 124532692254720.

The previous prime is 221001321301987. The next prime is 221001321302089. The reversal of 221001321302013 is 310203123100122.

It is not a de Polignac number, because 221001321302013 - 2⁶ = 221001321301949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001321382013) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3874400773 + ... + 3874457813.

It is an arithmetic number, because the mean of its divisors is an integer number (5335251431328).

Almost surely, 2^{221001321302013} is an apocalyptic number.

It is an amenable number.

221001321302013 is a deficient number, since it is larger than the sum of its proper divisors (120454770302979).

221001321302013 is a wasteful number, since it uses less digits than its factorization.

221001321302013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61234.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 221001321302013 its reverse (310203123100122), we get a palindrome (531204444402135).

The spelling of 221001321302013 in words is "two hundred twenty-one trillion, one billion, three hundred twenty-one million, three hundred two thousand, thirteen".