1121200021321 has 4 divisors (see below), whose sum is σ = 1121209195392. Its totient is φ = 1121190847252.

The previous prime is 1121200021309. The next prime is 1121200021349. The reversal of 1121200021321 is 1231200021211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1121200021321 - 2¹⁵ = 1121199988553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121200021295 and 1121200021304.

It is not an unprimeable number, because it can be changed into a prime (1121200021301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4401205 + ... + 4648978.

It is an arithmetic number, because the mean of its divisors is an integer number (280302298848).

Almost surely, 2^{1121200021321} is an apocalyptic number.

It is an amenable number.

1121200021321 is a deficient number, since it is larger than the sum of its proper divisors (9174071).

1121200021321 is an equidigital number, since it uses as much as digits as its factorization.

1121200021321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9174070.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1121200021321 its reverse (1231200021211), we get a palindrome (2352400042532).

The spelling of 1121200021321 in words is "one trillion, one hundred twenty-one billion, two hundred million, twenty-one thousand, three hundred twenty-one".