1221210413 has 8 divisors (see below), whose sum is σ = 1227450240. Its totient is φ = 1214980480.

The previous prime is 1221210391. The next prime is 1221210433. The reversal of 1221210413 is 3140121221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221210413 - 2¹⁰ = 1221209389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221210391 and 1221210400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221210433) 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 7 ways as a sum of consecutive naturals, for example, 404078 + ... + 407088.

It is an arithmetic number, because the mean of its divisors is an integer number (153431280).

Almost surely, 2^1221210413 is an apocalyptic number.

It is an amenable number.

1221210413 is a deficient number, since it is larger than the sum of its proper divisors (6239827).

1221210413 is a wasteful number, since it uses less digits than its factorization.

1221210413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4947.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1221210413 is about 34945.8211092543. The cubic root of 1221210413 is about 1068.8829910174.

Adding to 1221210413 its reverse (3140121221), we get a palindrome (4361331634).

The spelling of 1221210413 in words is "one billion, two hundred twenty-one million, two hundred ten thousand, four hundred thirteen".