1021113113 has 4 divisors (see below), whose sum is σ = 1056323940. Its totient is φ = 985902288.

The previous prime is 1021113101. The next prime is 1021113151. The reversal of 1021113113 is 3113111201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3113111201 = 39511 ⋅78791.

It can be written as a sum of positive squares in 2 ways, for example, as 459802249 + 561310864 = 21443^2 + 23692^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021113113 - 2⁸ = 1021112857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021113173) 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, 17605370 + ... + 17605427.

It is an arithmetic number, because the mean of its divisors is an integer number (264080985).

Almost surely, 2^1021113113 is an apocalyptic number.

It is an amenable number.

1021113113 is a deficient number, since it is larger than the sum of its proper divisors (35210827).

1021113113 is an equidigital number, since it uses as much as digits as its factorization.

1021113113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35210826.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1021113113 is about 31954.8605535997. The cubic root of 1021113113 is about 1006.9887479525.

Adding to 1021113113 its reverse (3113111201), we get a palindrome (4134224314).

The spelling of 1021113113 in words is "one billion, twenty-one million, one hundred thirteen thousand, one hundred thirteen".