1011231001 has 6 divisors (see below), whose sum is σ = 1111518506. Its totient is φ = 919300800.

The previous prime is 1011230993. The next prime is 1011231017. The reversal of 1011231001 is 1001321101.

It can be written as a sum of positive squares in only one way, i.e., 685392400 + 325838601 = 26180^2 + 18051^2 .

It is not a de Polignac number, because 1011231001 - 2³ = 1011230993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011231071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4178520 + ... + 4178761.

Almost surely, 2^1011231001 is an apocalyptic number.

1011231001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1011231001 is a deficient number, since it is larger than the sum of its proper divisors (100287505).

1011231001 is an equidigital number, since it uses as much as digits as its factorization.

1011231001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8357303 (or 8357292 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 1011231001 is about 31799.8585059745. The cubic root of 1011231001 is about 1003.7297387541.

Adding to 1011231001 its reverse (1001321101), we get a palindrome (2012552102).

The spelling of 1011231001 in words is "one billion, eleven million, two hundred thirty-one thousand, one".