1221342404444 has 12 divisors (see below), whose sum is σ = 2164404261600. Its totient is φ = 602941186848.

The previous prime is 1221342404431. The next prime is 1221342404459. The reversal of 1221342404444 is 4444042431221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1932503489 + ... + 1932504120.

It is an arithmetic number, because the mean of its divisors is an integer number (180367021800).

Almost surely, 2^{1221342404444} is an apocalyptic number.

It is an amenable number.

1221342404444 is a deficient number, since it is larger than the sum of its proper divisors (943061857156).

1221342404444 is a wasteful number, since it uses less digits than its factorization.

1221342404444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3865007692 (or 3865007690 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 35.

Adding to 1221342404444 its reverse (4444042431221), we get a palindrome (5665384835665).

The spelling of 1221342404444 in words is "one trillion, two hundred twenty-one billion, three hundred forty-two million, four hundred four thousand, four hundred forty-four".