1220321222113 has 6 divisors (see below), whose sum is σ = 1419557340066. Its totient is φ = 1045989618912.

The previous prime is 1220321222101. The next prime is 1220321222149. The reversal of 1220321222113 is 3112221230221.

It can be written as a sum of positive squares in only one way, i.e., 1143310532049 + 77010690064 = 1069257^2 + 277508^2 .

It is not a de Polignac number, because 1220321222113 - 2¹³ = 1220321213921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220321282113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12452257320 + ... + 12452257417.

It is an arithmetic number, because the mean of its divisors is an integer number (236592890011).

Almost surely, 2^{1220321222113} is an apocalyptic number.

It is an amenable number.

1220321222113 is a deficient number, since it is larger than the sum of its proper divisors (199236117953).

1220321222113 is an equidigital number, since it uses as much as digits as its factorization.

1220321222113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24904514751 (or 24904514744 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1220321222113 its reverse (3112221230221), we get a palindrome (4332542452334).

The spelling of 1220321222113 in words is "one trillion, two hundred twenty billion, three hundred twenty-one million, two hundred twenty-two thousand, one hundred thirteen".