1212221411 has 8 divisors (see below), whose sum is σ = 1234587744. Its totient is φ = 1190002240.

The previous prime is 1212221401. The next prime is 1212221447. The reversal of 1212221411 is 1141222121.

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 1212221411 - 2¹⁸ = 1211959267 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212221411.

It is not an unprimeable number, because it can be changed into a prime (1212221401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20096 + ... + 53181.

It is an arithmetic number, because the mean of its divisors is an integer number (154323468).

Almost surely, 2^1212221411 is an apocalyptic number.

1212221411 is a deficient number, since it is larger than the sum of its proper divisors (22366333).

1212221411 is an equidigital number, since it uses as much as digits as its factorization.

1212221411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73581.

The product of its digits is 64, while the sum is 17.

The square root of 1212221411 is about 34816.9701582432. The cubic root of 1212221411 is about 1066.2539429410.

Adding to 1212221411 its reverse (1141222121), we get a palindrome (2353443532).

It can be divided in two parts, 12122 and 21411, that added together give a palindrome (33533).

The spelling of 1212221411 in words is "one billion, two hundred twelve million, two hundred twenty-one thousand, four hundred eleven".