1233120420 has 144 divisors (see below), whose sum is σ = 4299230208. Its totient is φ = 280247040.

The previous prime is 1233120409. The next prime is 1233120443. The reversal of 1233120420 is 240213321.

1233120420 is a `hidden beast` number, since 1 + 233 + 12 + 0 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1233120393 and 1233120402.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 225357 + ... + 230763.

Almost surely, 2^1233120420 is an apocalyptic number.

1233120420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1233120420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2149615104).

1233120420 is an abundant number, since it is smaller than the sum of its proper divisors (3066109788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1233120420 is a wasteful number, since it uses less digits than its factorization.

1233120420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5610 (or 5605 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1233120420 is about 35115.8143861138. The cubic root of 1233120420 is about 1072.3465606039.

Adding to 1233120420 its reverse (240213321), we get a palindrome (1473333741).

The spelling of 1233120420 in words is "one billion, two hundred thirty-three million, one hundred twenty thousand, four hundred twenty".