1021110113 has 4 divisors (see below), whose sum is σ = 1021229460. Its totient is φ = 1020990768.

The previous prime is 1021110107. The next prime is 1021110119. The reversal of 1021110113 is 3110111201.

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: 3110111201 = 223 ⋅13946687.

It is an interprime number because it is at equal distance from previous prime (1021110107) and next prime (1021110119).

It can be written as a sum of positive squares in 2 ways, for example, as 735060544 + 286049569 = 27112^2 + 16913^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021110113 - 2¹² = 1021106017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021110094 and 1021110103.

It is not an unprimeable number, because it can be changed into a prime (1021110119) 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, 45758 + ... + 64311.

It is an arithmetic number, because the mean of its divisors is an integer number (255307365).

Almost surely, 2^1021110113 is an apocalyptic number.

It is an amenable number.

1021110113 is a deficient number, since it is larger than the sum of its proper divisors (119347).

1021110113 is an equidigital number, since it uses as much as digits as its factorization.

1021110113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119346.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1021110113 is about 31954.8136123495. The cubic root of 1021110113 is about 1006.9877617839.

Adding to 1021110113 its reverse (3110111201), we get a palindrome (4131221314).

The spelling of 1021110113 in words is "one billion, twenty-one million, one hundred ten thousand, one hundred thirteen".