1221434102 has 16 divisors (see below), whose sum is σ = 2122572192. Its totient is φ = 516300480.

The previous prime is 1221434083. The next prime is 1221434111. The reversal of 1221434102 is 2014341221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 596549 + ... + 598592.

It is an arithmetic number, because the mean of its divisors is an integer number (132660762).

Almost surely, 2^1221434102 is an apocalyptic number.

1221434102 is a deficient number, since it is larger than the sum of its proper divisors (901138090).

1221434102 is a wasteful number, since it uses less digits than its factorization.

1221434102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195223.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1221434102 is about 34949.0214741414. The cubic root of 1221434102 is about 1068.9482494331.

Adding to 1221434102 its reverse (2014341221), we get a palindrome (3235775323).

The spelling of 1221434102 in words is "one billion, two hundred twenty-one million, four hundred thirty-four thousand, one hundred two".