1211221411 has 8 divisors (see below), whose sum is σ = 1218963200. Its totient is φ = 1203491520.

The previous prime is 1211221409. The next prime is 1211221433. The reversal of 1211221411 is 1141221121.

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 1211221411 - 2¹ = 1211221409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211221111) 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, 289150 + ... + 293308.

It is an arithmetic number, because the mean of its divisors is an integer number (152370400).

Almost surely, 2^1211221411 is an apocalyptic number.

1211221411 is a deficient number, since it is larger than the sum of its proper divisors (7741789).

1211221411 is a wasteful number, since it uses less digits than its factorization.

1211221411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5949.

The product of its digits is 32, while the sum is 16.

The square root of 1211221411 is about 34802.6063822812. The cubic root of 1211221411 is about 1065.9606666844.

Adding to 1211221411 its reverse (1141221121), we get a palindrome (2352442532).

The spelling of 1211221411 in words is "one billion, two hundred eleven million, two hundred twenty-one thousand, four hundred eleven".