1011440435021 has 4 divisors (see below), whose sum is σ = 1014338545500. Its totient is φ = 1008542324544.

The previous prime is 1011440434997. The next prime is 1011440435041. The reversal of 1011440435021 is 1205340441101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 885123456100 + 126316978921 = 940810^2 + 355411^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011440435021 - 2³⁰ = 1010366693197 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 (1011440435041) 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, 1449054716 + ... + 1449055413.

It is an arithmetic number, because the mean of its divisors is an integer number (253584636375).

Almost surely, 2^{1011440435021} is an apocalyptic number.

It is an amenable number.

1011440435021 is a deficient number, since it is larger than the sum of its proper divisors (2898110479).

1011440435021 is an equidigital number, since it uses as much as digits as its factorization.

1011440435021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2898110478.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 1011440435021 its reverse (1205340441101), we get a palindrome (2216780876122).

The spelling of 1011440435021 in words is "one trillion, eleven billion, four hundred forty million, four hundred thirty-five thousand, twenty-one".