1011020113 has 4 divisors (see below), whose sum is σ = 1011190068. Its totient is φ = 1010850160.

The previous prime is 1011020099. The next prime is 1011020123. The reversal of 1011020113 is 3110201101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3110201101 = 7 ⋅444314443.

It can be written as a sum of positive squares in 2 ways, for example, as 12902464 + 998117649 = 3592^2 + 31593^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011020113 - 2¹⁷ = 1010889041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1011020113.

It is not an unprimeable number, because it can be changed into a prime (1011020123) 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, 75718 + ... + 88063.

It is an arithmetic number, because the mean of its divisors is an integer number (252797517).

Almost surely, 2^1011020113 is an apocalyptic number.

It is an amenable number.

1011020113 is a deficient number, since it is larger than the sum of its proper divisors (169955).

1011020113 is an equidigital number, since it uses as much as digits as its factorization.

1011020113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169954.

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

The square root of 1011020113 is about 31796.5424692686. The cubic root of 1011020113 is about 1003.6599593554.

Adding to 1011020113 its reverse (3110201101), we get a palindrome (4121221214).

The spelling of 1011020113 in words is "one billion, eleven million, twenty thousand, one hundred thirteen".