221120525 has 12 divisors (see below), whose sum is σ = 275836512. Its totient is φ = 175833840.

The previous prime is 221120519. The next prime is 221120531. The reversal of 221120525 is 525021122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (221120519) and next prime (221120531).

It is not a de Polignac number, because 221120525 - 2⁸ = 221120269 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221120497 and 221120506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22307 + ... + 30656.

It is an arithmetic number, because the mean of its divisors is an integer number (22986376).

Almost surely, 2^221120525 is an apocalyptic number.

221120525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221120525 is a deficient number, since it is larger than the sum of its proper divisors (54715987).

221120525 is a wasteful number, since it uses less digits than its factorization.

221120525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53140 (or 53135 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 221120525 is about 14870.1218892113. The cubic root of 221120525 is about 604.7042472221.

Adding to 221120525 its reverse (525021122), we get a palindrome (746141647).

The spelling of 221120525 in words is "two hundred twenty-one million, one hundred twenty thousand, five hundred twenty-five".