1113221021 has 8 divisors (see below), whose sum is σ = 1215660288. Its totient is φ = 1010988000.

The previous prime is 1113221003. The next prime is 1113221041. The reversal of 1113221021 is 1201223111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1113221021 is a prime.

It is a super-2 number, since 2×1113221021² = 2478522083192564882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1113220987 and 1113221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113221041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40160 + ... + 61961.

It is an arithmetic number, because the mean of its divisors is an integer number (151957536).

Almost surely, 2^1113221021 is an apocalyptic number.

1113221021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1113221021 is a deficient number, since it is larger than the sum of its proper divisors (102439267).

1113221021 is a wasteful number, since it uses less digits than its factorization.

1113221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103123.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1113221021 is about 33364.9669713608. The cubic root of 1113221021 is about 1036.3993521718.

Adding to 1113221021 its reverse (1201223111), we get a palindrome (2314444132).

The spelling of 1113221021 in words is "one billion, one hundred thirteen million, two hundred twenty-one thousand, twenty-one".