1221442434444 has 48 divisors (see below), whose sum is σ = 2949251810400. Its totient is φ = 392982245376.

The previous prime is 1221442434427. The next prime is 1221442434463. The reversal of 1221442434444 is 4444342441221.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 532242 + ... + 1651110.

It is an arithmetic number, because the mean of its divisors is an integer number (61442746050).

Almost surely, 2^{1221442434444} is an apocalyptic number.

It is an amenable number.

1221442434444 is an abundant number, since it is smaller than the sum of its proper divisors (1727809375956).

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

1221442434444 is a wasteful number, since it uses less digits than its factorization.

1221442434444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122042 (or 1122040 counting only the distinct ones).

The product of its digits is 393216, while the sum is 39.

Adding to 1221442434444 its reverse (4444342441221), we get a palindrome (5665784875665).

The spelling of 1221442434444 in words is "one trillion, two hundred twenty-one billion, four hundred forty-two million, four hundred thirty-four thousand, four hundred forty-four".