1221120030323 has 16 divisors (see below), whose sum is σ = 1303313587200. Its totient is φ = 1140080449536.

The previous prime is 1221120030311. The next prime is 1221120030349. The reversal of 1221120030323 is 3230300211221.

It is a cyclic number.

It is not a de Polignac number, because 1221120030323 - 2¹⁰ = 1221120029299 is a prime.

It is a super-2 number, since 2×1221120030323² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221120030295 and 1221120030304.

It is not an unprimeable number, because it can be changed into a prime (1221120030373) 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, 17126315 + ... + 17197467.

It is an arithmetic number, because the mean of its divisors is an integer number (81457099200).

Almost surely, 2^{1221120030323} is an apocalyptic number.

1221120030323 is a deficient number, since it is larger than the sum of its proper divisors (82193556877).

1221120030323 is a wasteful number, since it uses less digits than its factorization.

1221120030323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79246.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1221120030323 its reverse (3230300211221), we get a palindrome (4451420241544).

The spelling of 1221120030323 in words is "one trillion, two hundred twenty-one billion, one hundred twenty million, thirty thousand, three hundred twenty-three".