1111203440021 has 4 divisors (see below), whose sum is σ = 1111205555712. Its totient is φ = 1111201324332.

The previous prime is 1111203439981. The next prime is 1111203440023. The reversal of 1111203440021 is 1200443021111.

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 a de Polignac number, because none of the positive numbers 2^k-1111203440021 is a prime.

It is a super-2 number, since 2×1111203440021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111203439975 and 1111203440002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111203440023) 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, 396170 + ... + 1542516.

It is an arithmetic number, because the mean of its divisors is an integer number (277801388928).

Almost surely, 2^{1111203440021} is an apocalyptic number.

It is an amenable number.

1111203440021 is a deficient number, since it is larger than the sum of its proper divisors (2115691).

1111203440021 is an equidigital number, since it uses as much as digits as its factorization.

1111203440021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2115690.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1111203440021 its reverse (1200443021111), we get a palindrome (2311646461132).

The spelling of 1111203440021 in words is "one trillion, one hundred eleven billion, two hundred three million, four hundred forty thousand, twenty-one".