1212221104 has 10 divisors (see below), whose sum is σ = 2348678420. Its totient is φ = 606110544.

The previous prime is 1212221093. The next prime is 1212221119. The reversal of 1212221104 is 4011222121.

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 75763819 = 1212221104 / (1 + 2 + 1 + 2 + 2 + 2 + 1 + 1 + 0 + 4).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37881894 + ... + 37881925.

It is an arithmetic number, because the mean of its divisors is an integer number (234867842).

Almost surely, 2^1212221104 is an apocalyptic number.

It is an amenable number.

1212221104 is a deficient number, since it is larger than the sum of its proper divisors (1136457316).

1212221104 is an equidigital number, since it uses as much as digits as its factorization.

1212221104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75763827 (or 75763821 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1212221104 is about 34816.9657494733. The cubic root of 1212221104 is about 1066.2538529300.

Adding to 1212221104 its reverse (4011222121), we get a palindrome (5223443225).

The spelling of 1212221104 in words is "one billion, two hundred twelve million, two hundred twenty-one thousand, one hundred four".