1011540044011 has 4 divisors (see below), whose sum is σ = 1156045764592. Its totient is φ = 867034323432.

The previous prime is 1011540043991. The next prime is 1011540044023. The reversal of 1011540044011 is 1104400451101.

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

It is a cyclic number.

It is not a de Polignac number, because 1011540044011 - 2⁵ = 1011540043979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011540048011) 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, 72252860280 + ... + 72252860293.

It is an arithmetic number, because the mean of its divisors is an integer number (289011441148).

Almost surely, 2^{1011540044011} is an apocalyptic number.

1011540044011 is a deficient number, since it is larger than the sum of its proper divisors (144505720581).

1011540044011 is an equidigital number, since it uses as much as digits as its factorization.

1011540044011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144505720580.

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 1011540044011 its reverse (1104400451101), we get a palindrome (2115940495112).

The spelling of 1011540044011 in words is "one trillion, eleven billion, five hundred forty million, forty-four thousand, eleven".