221002101220013 has 4 divisors (see below), whose sum is σ = 221002158972540. Its totient is φ = 221002043467488.

The previous prime is 221002101219971. The next prime is 221002101220091. The reversal of 221002101220013 is 310022101200122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 98628991651369 + 122373109568644 = 9931213^2 + 11062238^2 .

It is a cyclic number.

It is not a de Polignac number, because 221002101220013 - 2⁴⁰ = 219902589592237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221002101219973 and 221002101220000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002101220513) 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, 22695170 + ... + 30936627.

It is an arithmetic number, because the mean of its divisors is an integer number (55250539743135).

Almost surely, 2^{221002101220013} is an apocalyptic number.

It is an amenable number.

221002101220013 is a deficient number, since it is larger than the sum of its proper divisors (57752527).

221002101220013 is an equidigital number, since it uses as much as digits as its factorization.

221002101220013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57752526.

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

Adding to 221002101220013 its reverse (310022101200122), we get a palindrome (531024202420135).

The spelling of 221002101220013 in words is "two hundred twenty-one trillion, two billion, one hundred one million, two hundred twenty thousand, thirteen".