111421104525 has 24 divisors (see below), whose sum is σ = 204684696960. Its totient is φ = 59424588720.

The previous prime is 111421104517. The next prime is 111421104583. The reversal of 111421104525 is 525401124111.

111421104525 is a `hidden beast` number, since 1 + 1 + 14 + 21 + 104 + 525 = 666.

It is not a de Polignac number, because 111421104525 - 2³ = 111421104517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82533477 + ... + 82534826.

It is an arithmetic number, because the mean of its divisors is an integer number (8528529040).

Almost surely, 2^111421104525 is an apocalyptic number.

111421104525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

111421104525 is a deficient number, since it is larger than the sum of its proper divisors (93263592435).

111421104525 is a wasteful number, since it uses less digits than its factorization.

111421104525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165068322 (or 165068311 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

Adding to 111421104525 its reverse (525401124111), we get a palindrome (636822228636).

The spelling of 111421104525 in words is "one hundred eleven billion, four hundred twenty-one million, one hundred four thousand, five hundred twenty-five".