1011011001 has 32 divisors (see below), whose sum is σ = 1809927168. Its totient is φ = 484799040.

The previous prime is 1011010951. The next prime is 1011011017. The reversal of 1011011001 is 1001101101.

It is not a de Polignac number, because 1011011001 - 2¹⁷ = 1010879929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1011011801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165331 + ... + 171336.

It is an arithmetic number, because the mean of its divisors is an integer number (56560224).

Almost surely, 2^1011011001 is an apocalyptic number.

1011011001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1011011001 is a deficient number, since it is larger than the sum of its proper divisors (798916167).

1011011001 is a wasteful number, since it uses less digits than its factorization.

1011011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336701.

The product of its (nonzero) digits is 1, while the sum is 6.

The square root of 1011011001 is about 31796.3991829264. The cubic root of 1011011001 is about 1003.6569441246.

Adding to 1011011001 its reverse (1001101101), we get a palindrome (2012112102).

It can be divided in two parts, 101101100 and 1, that added together give a palindrome (101101101).

The spelling of 1011011001 in words is "one billion, eleven million, eleven thousand, one".