1103112021 has 16 divisors (see below), whose sum is σ = 1605833280. Its totient is φ = 668008320.

The previous prime is 1103111857. The next prime is 1103112037. The reversal of 1103112021 is 1202113011.

It is not a de Polignac number, because 1103112021 - 2⁹ = 1103111509 is a prime.

It is a super-2 number, since 2×1103112021² = 2433712261749408882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1103111988 and 1103112006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103112041) 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, 29571 + ... + 55503.

It is an arithmetic number, because the mean of its divisors is an integer number (100364580).

Almost surely, 2^1103112021 is an apocalyptic number.

1103112021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1103112021 is a deficient number, since it is larger than the sum of its proper divisors (502721259).

1103112021 is a wasteful number, since it uses less digits than its factorization.

1103112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27236.

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

The square root of 1103112021 is about 33213.1302499478. The cubic root of 1103112021 is about 1033.2526768702.

Adding to 1103112021 its reverse (1202113011), we get a palindrome (2305225032).

The spelling of 1103112021 in words is "one billion, one hundred three million, one hundred twelve thousand, twenty-one".