1212221103 has 8 divisors (see below), whose sum is σ = 1625973888. Its totient is φ = 803307864.

The previous prime is 1212221093. The next prime is 1212221119. The reversal of 1212221103 is 3011222121.

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

It is not a de Polignac number, because 1212221103 - 2⁸ = 1212220847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212221503) 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, 1209301 + ... + 1210302.

It is an arithmetic number, because the mean of its divisors is an integer number (203246736).

Almost surely, 2^1212221103 is an apocalyptic number.

1212221103 is a deficient number, since it is larger than the sum of its proper divisors (413752785).

1212221103 is a wasteful number, since it uses less digits than its factorization.

1212221103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2419773.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1212221103 is about 34816.9657351125. The cubic root of 1212221103 is about 1066.2538526368.

Adding to 1212221103 its reverse (3011222121), we get a palindrome (4223443224).

The spelling of 1212221103 in words is "one billion, two hundred twelve million, two hundred twenty-one thousand, one hundred three".