1111331320021 has 16 divisors (see below), whose sum is σ = 1213175956608. Its totient is φ = 1011917275200.

The previous prime is 1111331320019. The next prime is 1111331320031. The reversal of 1111331320021 is 1200231331111.

It is not a de Polignac number, because 1111331320021 - 2¹ = 1111331320019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111331320031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1669410 + ... + 2238211.

It is an arithmetic number, because the mean of its divisors is an integer number (75823497288).

Almost surely, 2^{1111331320021} is an apocalyptic number.

It is an amenable number.

1111331320021 is a deficient number, since it is larger than the sum of its proper divisors (101844636587).

1111331320021 is a wasteful number, since it uses less digits than its factorization.

1111331320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3907932.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1111331320021 its reverse (1200231331111), we get a palindrome (2311562651132).

The spelling of 1111331320021 in words is "one trillion, one hundred eleven billion, three hundred thirty-one million, three hundred twenty thousand, twenty-one".