1221410124 has 96 divisors (see below), whose sum is σ = 3604769280. Its totient is φ = 354024000.

The previous prime is 1221410093. The next prime is 1221410149. The reversal of 1221410124 is 4210141221.

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 = 1221410097 and 1221410106.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4974 + ... + 49674.

It is an arithmetic number, because the mean of its divisors is an integer number (37549680).

Almost surely, 2^1221410124 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 1221410124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1802384640).

1221410124 is an abundant number, since it is smaller than the sum of its proper divisors (2383359156).

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

1221410124 is a wasteful number, since it uses less digits than its factorization.

1221410124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44748 (or 44740 counting only the distinct ones).

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

The square root of 1221410124 is about 34948.6784299493. The cubic root of 1221410124 is about 1068.9412545384.

Adding to 1221410124 its reverse (4210141221), we get a palindrome (5431551345).

The spelling of 1221410124 in words is "one billion, two hundred twenty-one million, four hundred ten thousand, one hundred twenty-four".