1115742227721 has 32 divisors (see below), whose sum is σ = 1639866576768. Its totient is φ = 669139107840.

The previous prime is 1115742227707. The next prime is 1115742227723. The reversal of 1115742227721 is 1277222475111.

It is a happy number.

It is not a de Polignac number, because 1115742227721 - 2²¹ = 1115740130569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1115742227723) 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 31 ways as a sum of consecutive naturals, for example, 26332665 + ... + 26375001.

It is an arithmetic number, because the mean of its divisors is an integer number (51245830524).

Almost surely, 2^{1115742227721} is an apocalyptic number.

1115742227721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1115742227721 is a deficient number, since it is larger than the sum of its proper divisors (524124349047).

1115742227721 is a wasteful number, since it uses less digits than its factorization.

1115742227721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50681.

The product of its digits is 109760, while the sum is 42.

The spelling of 1115742227721 in words is "one trillion, one hundred fifteen billion, seven hundred forty-two million, two hundred twenty-seven thousand, seven hundred twenty-one".