1112123421 has 12 divisors (see below), whose sum is σ = 1609376860. Its totient is φ = 740041920.

The previous prime is 1112123387. The next prime is 1112123429. The reversal of 1112123421 is 1243212111.

1112123421 is a `hidden beast` number, since 111 + 212 + 342 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 755480196 + 356643225 = 27486^2 + 18885^2 .

It is not a de Polignac number, because 1112123421 - 2²³ = 1103734813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1112123394 and 1112123403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112123429) 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, 109336 + ... + 119073.

Almost surely, 2^1112123421 is an apocalyptic number.

It is an amenable number.

1112123421 is a deficient number, since it is larger than the sum of its proper divisors (497253439).

1112123421 is a wasteful number, since it uses less digits than its factorization.

1112123421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228956 (or 228953 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 1112123421 is about 33348.5145246381. The cubic root of 1112123421 is about 1036.0586213928.

Adding to 1112123421 its reverse (1243212111), we get a palindrome (2355335532).

The spelling of 1112123421 in words is "one billion, one hundred twelve million, one hundred twenty-three thousand, four hundred twenty-one".