111421031125 has 32 divisors (see below), whose sum is σ = 142953763680. Its totient is φ = 86652160000.

The previous prime is 111421031123. The next prime is 111421031129. The reversal of 111421031125 is 521130124111.

It can be written as a sum of positive squares in 16 ways, for example, as 111314982321 + 106048804 = 333639^2 + 10298^2 .

It is not a de Polignac number, because 111421031125 - 2¹ = 111421031123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111421031096 and 111421031105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111421031123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1401441 + ... + 1478809.

It is an arithmetic number, because the mean of its divisors is an integer number (4467305115).

Almost surely, 2^111421031125 is an apocalyptic number.

It is an amenable number.

111421031125 is a deficient number, since it is larger than the sum of its proper divisors (31532732555).

111421031125 is an equidigital number, since it uses as much as digits as its factorization.

111421031125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77706 (or 77696 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 22.

Adding to 111421031125 its reverse (521130124111), we get a palindrome (632551155236).

The spelling of 111421031125 in words is "one hundred eleven billion, four hundred twenty-one million, thirty-one thousand, one hundred twenty-five".