111105525143421 has 12 divisors (see below), whose sum is σ = 160885972407420. Its totient is φ = 73885636003200.

The previous prime is 111105525143381. The next prime is 111105525143443. The reversal of 111105525143421 is 124341525501111.

It is a happy number.

111105525143421 is a `hidden beast` number, since 1 + 1 + 1 + 1 + 0 + 552 + 51 + 4 + 34 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 77446846551321 + 33658678592100 = 8800389^2 + 5801610^2 .

It is not a de Polignac number, because 111105525143421 - 2⁶ = 111105525143357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111105525163421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15392837226 + ... + 15392844443.

It is an arithmetic number, because the mean of its divisors is an integer number (13407164367285).

Almost surely, 2^{111105525143421} is an apocalyptic number.

It is an amenable number.

111105525143421 is a deficient number, since it is larger than the sum of its proper divisors (49780447263999).

111105525143421 is a wasteful number, since it uses less digits than its factorization.

111105525143421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30785682076 (or 30785682073 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 36.

The spelling of 111105525143421 in words is "one hundred eleven trillion, one hundred five billion, five hundred twenty-five million, one hundred forty-three thousand, four hundred twenty-one".