1221444224200 has 48 divisors (see below), whose sum is σ = 2839933946880. Its totient is φ = 488564592960.

The previous prime is 1221444224171. The next prime is 1221444224243. The reversal of 1221444224200 is 24224441221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11447497 + ... + 11553703.

It is an arithmetic number, because the mean of its divisors is an integer number (59165290560).

Almost surely, 2^{1221444224200} is an apocalyptic number.

1221444224200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221444224200 is an abundant number, since it is smaller than the sum of its proper divisors (1618489722680).

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

1221444224200 is a wasteful number, since it uses less digits than its factorization.

1221444224200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163726 (or 163717 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 1221444224200 its reverse (24224441221), we get a palindrome (1245668665421).

The spelling of 1221444224200 in words is "one trillion, two hundred twenty-one billion, four hundred forty-four million, two hundred twenty-four thousand, two hundred".