1117361721 has 16 divisors (see below), whose sum is σ = 1720202624. Its totient is φ = 631908864.

The previous prime is 1117361699. The next prime is 1117361723. The reversal of 1117361721 is 1271637111.

It is not a de Polignac number, because 1117361721 - 2⁶ = 1117361657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1117361723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272230 + ... + 276303.

It is an arithmetic number, because the mean of its divisors is an integer number (107512664).

Almost surely, 2^1117361721 is an apocalyptic number.

It is an amenable number.

1117361721 is a deficient number, since it is larger than the sum of its proper divisors (602840903).

1117361721 is an equidigital number, since it uses as much as digits as its factorization.

1117361721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548640.

The product of its digits is 1764, while the sum is 30.

The square root of 1117361721 is about 33426.9609895964. The cubic root of 1117361721 is about 1037.6827478152.

Adding to 1117361721 its reverse (1271637111), we get a palindrome (2388998832).

The spelling of 1117361721 in words is "one billion, one hundred seventeen million, three hundred sixty-one thousand, seven hundred twenty-one".