1243221102 has 32 divisors (see below), whose sum is σ = 2769651360. Its totient is φ = 413366400.

The previous prime is 1243221079. The next prime is 1243221103. The reversal of 1243221102 is 2011223421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243221103) 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 15 ways as a sum of consecutive naturals, for example, 7053 + ... + 50360.

It is an arithmetic number, because the mean of its divisors is an integer number (86551605).

Almost surely, 2^1243221102 is an apocalyptic number.

1243221102 is an abundant number, since it is smaller than the sum of its proper divisors (1526430258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1243221102 is a wasteful number, since it uses less digits than its factorization.

1243221102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57825 (or 57819 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1243221102 is about 35259.3406347878. The cubic root of 1243221102 is about 1075.2665218379.

Adding to 1243221102 its reverse (2011223421), we get a palindrome (3254444523).

The spelling of 1243221102 in words is "one billion, two hundred forty-three million, two hundred twenty-one thousand, one hundred two".