1221410413 has 4 divisors (see below), whose sum is σ = 1226478748. Its totient is φ = 1216342080.

The previous prime is 1221410369. The next prime is 1221410419. The reversal of 1221410413 is 3140141221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3140141221 = 7 ⋅448591603.

It can be written as a sum of positive squares in 2 ways, for example, as 824723524 + 396686889 = 28718^2 + 19917^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221410413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221410419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2533806 + ... + 2534287.

It is an arithmetic number, because the mean of its divisors is an integer number (306619687).

Almost surely, 2^1221410413 is an apocalyptic number.

It is an amenable number.

1221410413 is a deficient number, since it is larger than the sum of its proper divisors (5068335).

1221410413 is an equidigital number, since it uses as much as digits as its factorization.

1221410413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5068334.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1221410413 is about 34948.6825645832. The cubic root of 1221410413 is about 1068.9413388464.

Adding to 1221410413 its reverse (3140141221), we get a palindrome (4361551634).

The spelling of 1221410413 in words is "one billion, two hundred twenty-one million, four hundred ten thousand, four hundred thirteen".