1111320123021 has 12 divisors (see below), whose sum is σ = 1610304030972. Its totient is φ = 738542918976.

The previous prime is 1111320123013. The next prime is 1111320123073. The reversal of 1111320123021 is 1203210231111.

1111320123021 is a `hidden beast` number, since 1 + 111 + 320 + 1 + 230 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 679947018921 + 431373104100 = 824589^2 + 656790^2 .

It is not a de Polignac number, because 1111320123021 - 2³ = 1111320123013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111320122985 and 1111320123003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111320123421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 194760576 + ... + 194766281.

It is an arithmetic number, because the mean of its divisors is an integer number (134192002581).

Almost surely, 2^{1111320123021} is an apocalyptic number.

It is an amenable number.

1111320123021 is a deficient number, since it is larger than the sum of its proper divisors (498983907951).

1111320123021 is a wasteful number, since it uses less digits than its factorization.

1111320123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389527180 (or 389527177 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1111320123021 its reverse (1203210231111), we get a palindrome (2314530354132).

The spelling of 1111320123021 in words is "one trillion, one hundred eleven billion, three hundred twenty million, one hundred twenty-three thousand, twenty-one".