1040113021 has 2 divisors, whose sum is σ = 1040113022. Its totient is φ = 1040113020.

The previous prime is 1040112971. The next prime is 1040113027. The reversal of 1040113021 is 1203110401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 953883225 + 86229796 = 30885^2 + 9286^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040113021 - 2⁷ = 1040112893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1040112992 and 1040113010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040113027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520056510 + 520056511.

It is an arithmetic number, because the mean of its divisors is an integer number (520056511).

Almost surely, 2^1040113021 is an apocalyptic number.

It is an amenable number.

1040113021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040113021 is an equidigital number, since it uses as much as digits as its factorization.

1040113021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1040113021 is about 32250.7832618062. The cubic root of 1040113021 is about 1013.1961038654.

Adding to 1040113021 its reverse (1203110401), we get a palindrome (2243223422).

The spelling of 1040113021 in words is "one billion, forty million, one hundred thirteen thousand, twenty-one".