111421012 has 6 divisors (see below), whose sum is σ = 194986778. Its totient is φ = 55710504.

The previous prime is 111421003. The next prime is 111421019. The reversal of 111421012 is 210124111.

It can be written as a sum of positive squares in only one way, i.e., 109746576 + 1674436 = 10476^2 + 1294^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111420983 and 111421001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111421019) by changing a digit.

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 as a sum of consecutive naturals, namely, 13927623 + ... + 13927630.

Almost surely, 2^111421012 is an apocalyptic number.

It is an amenable number.

111421012 is a deficient number, since it is larger than the sum of its proper divisors (83565766).

111421012 is a wasteful number, since it uses less digits than its factorization.

111421012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27855257 (or 27855255 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 111421012 is about 10555.6151881356. The cubic root of 111421012 is about 481.1963963009.

Adding to 111421012 its reverse (210124111), we get a palindrome (321545123).

The spelling of 111421012 in words is "one hundred eleven million, four hundred twenty-one thousand, twelve".