1321330220123 has 16 divisors (see below), whose sum is σ = 1346607838464. Its totient is φ = 1296221050080.

The previous prime is 1321330220087. The next prime is 1321330220129. The reversal of 1321330220123 is 3210220331231.

It is a cyclic number.

It is not a de Polignac number, because 1321330220123 - 2⁶ = 1321330220059 is a prime.

It is a super-2 number, since 2×1321330220123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321330220129) 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, 36858818 + ... + 36894648.

It is an arithmetic number, because the mean of its divisors is an integer number (84162989904).

Almost surely, 2^{1321330220123} is an apocalyptic number.

1321330220123 is a deficient number, since it is larger than the sum of its proper divisors (25277618341).

1321330220123 is a wasteful number, since it uses less digits than its factorization.

1321330220123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38162.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1321330220123 its reverse (3210220331231), we get a palindrome (4531550551354).

The spelling of 1321330220123 in words is "one trillion, three hundred twenty-one billion, three hundred thirty million, two hundred twenty thousand, one hundred twenty-three".