1221443442430 has 64 divisors (see below), whose sum is σ = 2340098035200. Its totient is φ = 457717219200.

The previous prime is 1221443442419. The next prime is 1221443442431. The reversal of 1221443442430 is 342443441221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221443442431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15754701 + ... + 15832039.

It is an arithmetic number, because the mean of its divisors is an integer number (36564031800).

Almost surely, 2^{1221443442430} is an apocalyptic number.

1221443442430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221443442430 is a deficient number, since it is larger than the sum of its proper divisors (1118654592770).

1221443442430 is a wasteful number, since it uses less digits than its factorization.

1221443442430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78289.

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 1221443442430 its reverse (342443441221), we get a palindrome (1563886883651).

The spelling of 1221443442430 in words is "one trillion, two hundred twenty-one billion, four hundred forty-three million, four hundred forty-two thousand, four hundred thirty".