1222400124 has 72 divisors (see below), whose sum is σ = 3375240960. Its totient is φ = 369943200.

The previous prime is 1222400063. The next prime is 1222400161. The reversal of 1222400124 is 4210042221.

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 = 1222400097 and 1222400106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 409959 + ... + 412929.

Almost surely, 2^1222400124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222400124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1687620480).

1222400124 is an abundant number, since it is smaller than the sum of its proper divisors (2152840836).

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

1222400124 is a wasteful number, since it uses less digits than its factorization.

1222400124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4031 (or 4026 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1222400124 is about 34962.8391867709. The cubic root of 1222400124 is about 1069.2299825782.

Adding to 1222400124 its reverse (4210042221), we get a palindrome (5432442345).

The spelling of 1222400124 in words is "one billion, two hundred twenty-two million, four hundred thousand, one hundred twenty-four".