1301221020221 has 8 divisors (see below), whose sum is σ = 1318217819520. Its totient is φ = 1284297326208.

The previous prime is 1301221020193. The next prime is 1301221020301. The reversal of 1301221020221 is 1220201221031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1301221020221 - 2⁶ = 1301221020157 is a prime.

It is a super-2 number, since 2×1301221020221² (a number of 25 digits) contains 22 as substring.

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 1301221020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301221020521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18240491 + ... + 18311688.

It is an arithmetic number, because the mean of its divisors is an integer number (164777227440).

Almost surely, 2^{1301221020221} is an apocalyptic number.

It is an amenable number.

1301221020221 is a deficient number, since it is larger than the sum of its proper divisors (16996799299).

1301221020221 is an equidigital number, since it uses as much as digits as its factorization.

1301221020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36552643.

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

Adding to 1301221020221 its reverse (1220201221031), we get a palindrome (2521422241252).

The spelling of 1301221020221 in words is "one trillion, three hundred one billion, two hundred twenty-one million, twenty thousand, two hundred twenty-one".