1221302220303 has 16 divisors (see below), whose sum is σ = 1776458102400. Its totient is φ = 740175451680.

The previous prime is 1221302220287. The next prime is 1221302220323. The reversal of 1221302220303 is 3030222031221.

It is a happy number.

It is not a de Polignac number, because 1221302220303 - 2⁴ = 1221302220287 is a prime.

It is a super-2 number, since 2×1221302220303² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221302220303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221302220323) 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, 5836828 + ... + 6042446.

It is an arithmetic number, because the mean of its divisors is an integer number (111028631400).

Almost surely, 2^{1221302220303} is an apocalyptic number.

1221302220303 is a deficient number, since it is larger than the sum of its proper divisors (555155882097).

1221302220303 is a wasteful number, since it uses less digits than its factorization.

1221302220303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385622.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 1221302220303 its reverse (3030222031221), we get a palindrome (4251524251524).

The spelling of 1221302220303 in words is "one trillion, two hundred twenty-one billion, three hundred two million, two hundred twenty thousand, three hundred three".