1221124410 has 160 divisors (see below), whose sum is σ = 3698348544. Its totient is φ = 286416000.

The previous prime is 1221124391. The next prime is 1221124417. The reversal of 1221124410 is 144211221.

1221124410 is a `hidden beast` number, since 1 + 221 + 1 + 2 + 441 + 0 = 666.

It is a super-2 number, since 2×1221124410² = 2982289649395696200, which contains 22 as substring.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1221124417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 274000 + ... + 278420.

Almost surely, 2^1221124410 is an apocalyptic number.

1221124410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221124410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1849174272).

1221124410 is an abundant number, since it is smaller than the sum of its proper divisors (2477224134).

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

1221124410 is a wasteful number, since it uses less digits than its factorization.

1221124410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4482 (or 4473 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1221124410 is about 34944.5905684986. The cubic root of 1221124410 is about 1068.8578986170.

Adding to 1221124410 its reverse (144211221), we get a palindrome (1365335631).

The spelling of 1221124410 in words is "one billion, two hundred twenty-one million, one hundred twenty-four thousand, four hundred ten".