1111221201321 has 24 divisors (see below), whose sum is σ = 2001160259904. Its totient is φ = 577257766560.

The previous prime is 1111221201287. The next prime is 1111221201331. The reversal of 1111221201321 is 1231021221111.

It is a happy number.

1111221201321 is a `hidden beast` number, since 11 + 112 + 21 + 201 + 321 = 666.

It is not a de Polignac number, because 1111221201321 - 2⁶ = 1111221201257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111221201294 and 1111221201303.

It is not an unprimeable number, because it can be changed into a prime (1111221201331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 801746206 + ... + 801747591.

It is an arithmetic number, because the mean of its divisors is an integer number (83381677496).

Almost surely, 2^{1111221201321} is an apocalyptic number.

1111221201321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1111221201321 is a deficient number, since it is larger than the sum of its proper divisors (889939058583).

1111221201321 is a wasteful number, since it uses less digits than its factorization.

1111221201321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603493821 (or 1603493818 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1111221201321 its reverse (1231021221111), we get a palindrome (2342242422432).

The spelling of 1111221201321 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, two hundred one thousand, three hundred twenty-one".