1321200301123 has 4 divisors (see below), whose sum is σ = 1324265731488. Its totient is φ = 1318134870760.

The previous prime is 1321200301103. The next prime is 1321200301129. The reversal of 1321200301123 is 3211030021231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321200301123 is a prime.

It is a super-2 number, since 2×1321200301123² (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 1321200301123.

It is not an unprimeable number, because it can be changed into a prime (1321200301129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1532714536 + ... + 1532715397.

It is an arithmetic number, because the mean of its divisors is an integer number (331066432872).

Almost surely, 2^{1321200301123} is an apocalyptic number.

1321200301123 is a deficient number, since it is larger than the sum of its proper divisors (3065430365).

1321200301123 is an equidigital number, since it uses as much as digits as its factorization.

1321200301123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3065430364.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1321200301123 its reverse (3211030021231), we get a palindrome (4532230322354).

The spelling of 1321200301123 in words is "one trillion, three hundred twenty-one billion, two hundred million, three hundred one thousand, one hundred twenty-three".