1113011021 has 4 divisors (see below), whose sum is σ = 1113589344. Its totient is φ = 1112432700.

The previous prime is 1113010999. The next prime is 1113011041. The reversal of 1113011021 is 1201103111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1113011021 - 2⁶ = 1113010957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1113010993 and 1113011011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113011041) 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, 286265 + ... + 290126.

It is an arithmetic number, because the mean of its divisors is an integer number (278397336).

Almost surely, 2^1113011021 is an apocalyptic number.

It is an amenable number.

1113011021 is a deficient number, since it is larger than the sum of its proper divisors (578323).

1113011021 is an equidigital number, since it uses as much as digits as its factorization.

1113011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578322.

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

The square root of 1113011021 is about 33361.8198094768. The cubic root of 1113011021 is about 1036.3341786657.

Adding to 1113011021 its reverse (1201103111), we get a palindrome (2314114132).

The spelling of 1113011021 in words is "one billion, one hundred thirteen million, eleven thousand, twenty-one".