1011810081 has 32 divisors (see below), whose sum is σ = 1411458048. Its totient is φ = 644212800.

The previous prime is 1011810077. The next prime is 1011810101. The reversal of 1011810081 is 1800181101.

It is a happy number.

It is not a de Polignac number, because 1011810081 - 2² = 1011810077 is a prime.

It is a super-2 number, since 2×1011810081² = 2047519280026453122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1011810001) 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, 1443031 + ... + 1443731.

It is an arithmetic number, because the mean of its divisors is an integer number (44108064).

Almost surely, 2^1011810081 is an apocalyptic number.

It is an amenable number.

1011810081 is a deficient number, since it is larger than the sum of its proper divisors (399647967).

1011810081 is a wasteful number, since it uses less digits than its factorization.

1011810081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981.

The product of its (nonzero) digits is 64, while the sum is 21.

The square root of 1011810081 is about 31808.9622748055. The cubic root of 1011810081 is about 1003.9212969978.

Adding to 1011810081 its reverse (1800181101), we get a palindrome (2811991182).

The spelling of 1011810081 in words is "one billion, eleven million, eight hundred ten thousand, eighty-one".