1113000021 has 28 divisors (see below), whose sum is σ = 1907136352. Its totient is φ = 635997096.

The previous prime is 1113000001. The next prime is 1113000029. The reversal of 1113000021 is 1200003111.

It is not a de Polignac number, because 1113000021 - 2⁵ = 1112999989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1112999967 and 1113000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113000029) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 103951 + ... + 114156.

Almost surely, 2^1113000021 is an apocalyptic number.

It is an amenable number.

1113000021 is a deficient number, since it is larger than the sum of its proper divisors (794136331).

1113000021 is an frugal number, since it uses more digits than its factorization.

1113000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218132 (or 218117 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1113000021 is about 33361.6549499571. The cubic root of 1113000021 is about 1036.3307645895.

Adding to 1113000021 its reverse (1200003111), we get a palindrome (2313003132).

The spelling of 1113000021 in words is "one billion, one hundred thirteen million, twenty-one", and thus it is an aban number.