1111211020321 has 4 divisors (see below), whose sum is σ = 1111234342912. Its totient is φ = 1111187697732.

The previous prime is 1111211020313. The next prime is 1111211020327. The reversal of 1111211020321 is 1230201121111.

It is a happy number.

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 1111211020321 - 2³ = 1111211020313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111211020295 and 1111211020304.

It is not an unprimeable number, because it can be changed into a prime (1111211020327) 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, 11589681 + ... + 11685166.

It is an arithmetic number, because the mean of its divisors is an integer number (277808585728).

Almost surely, 2^{1111211020321} is an apocalyptic number.

It is an amenable number.

1111211020321 is a deficient number, since it is larger than the sum of its proper divisors (23322591).

1111211020321 is an equidigital number, since it uses as much as digits as its factorization.

1111211020321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23322590.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1111211020321 its reverse (1230201121111), we get a palindrome (2341412141432).

The spelling of 1111211020321 in words is "one trillion, one hundred eleven billion, two hundred eleven million, twenty thousand, three hundred twenty-one".