1113111021 has 16 divisors (see below), whose sum is σ = 1619831808. Its totient is φ = 674295600.

The previous prime is 1113111019. The next prime is 1113111073. The reversal of 1113111021 is 1201113111.

It is not a de Polignac number, because 1113111021 - 2¹ = 1113111019 is a prime.

It is a super-2 number, since 2×1113111021² = 2478032290143324882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1113110988 and 1113111006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113111221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76860 + ... + 90186.

It is an arithmetic number, because the mean of its divisors is an integer number (101239488).

Almost surely, 2^1113111021 is an apocalyptic number.

1113111021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1113111021 is a deficient number, since it is larger than the sum of its proper divisors (506720787).

1113111021 is a wasteful number, since it uses less digits than its factorization.

1113111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15872.

The product of its (nonzero) digits is 6, while the sum is 12.

The square root of 1113111021 is about 33363.3184950178. The cubic root of 1113111021 is about 1036.3652146909.

Adding to 1113111021 its reverse (1201113111), we get a palindrome (2314224132).

The spelling of 1113111021 in words is "one billion, one hundred thirteen million, one hundred eleven thousand, twenty-one".