1113220521 has 48 divisors (see below), whose sum is σ = 1900953600. Its totient is φ = 614581344.

The previous prime is 1113220519. The next prime is 1113220529. The reversal of 1113220521 is 1250223111.

1113220521 is a `hidden beast` number, since 11 + 132 + 2 + 0 + 521 = 666.

It is not a de Polignac number, because 1113220521 - 2¹ = 1113220519 is a prime.

It is a super-2 number, since 2×1113220521² = 2478519856751022882, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1113220494 and 1113220503.

It is not an unprimeable number, because it can be changed into a prime (1113220529) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 231540 + ... + 236298.

It is an arithmetic number, because the mean of its divisors is an integer number (39603200).

Almost surely, 2^1113220521 is an apocalyptic number.

It is an amenable number.

1113220521 is a deficient number, since it is larger than the sum of its proper divisors (787733079).

1113220521 is a wasteful number, since it uses less digits than its factorization.

1113220521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4898 (or 4895 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1113220521 is about 33364.9594784708. The cubic root of 1113220521 is about 1036.3991970065.

Adding to 1113220521 its reverse (1250223111), we get a palindrome (2363443632).

The spelling of 1113220521 in words is "one billion, one hundred thirteen million, two hundred twenty thousand, five hundred twenty-one".