1111501601 has 4 divisors (see below), whose sum is σ = 1270287552. Its totient is φ = 952715652.

The previous prime is 1111501553. The next prime is 1111501609. The reversal of 1111501601 is 1061051111.

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 not a de Polignac number, because 1111501601 - 2⁶ = 1111501537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1111501601.

It is not an unprimeable number, because it can be changed into a prime (1111501609) 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, 79392965 + ... + 79392978.

It is an arithmetic number, because the mean of its divisors is an integer number (317571888).

Almost surely, 2^1111501601 is an apocalyptic number.

It is an amenable number.

1111501601 is a deficient number, since it is larger than the sum of its proper divisors (158785951).

1111501601 is an equidigital number, since it uses as much as digits as its factorization.

1111501601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158785950.

The product of its (nonzero) digits is 30, while the sum is 17.

The square root of 1111501601 is about 33339.1901671291. The cubic root of 1111501601 is about 1035.8654887277.

Adding to 1111501601 its reverse (1061051111), we get a palindrome (2172552712).

The spelling of 1111501601 in words is "one billion, one hundred eleven million, five hundred one thousand, six hundred one".