1221032401444 has 24 divisors (see below), whose sum is σ = 2194148224800. Its totient is φ = 594203987520.

The previous prime is 1221032401343. The next prime is 1221032401471. The reversal of 1221032401444 is 4441042301221.

It is a super-2 number, since 2×1221032401444² (a number of 25 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 8815914 + ... + 8953345.

It is an arithmetic number, because the mean of its divisors is an integer number (91422842700).

Almost surely, 2^{1221032401444} is an apocalyptic number.

It is an amenable number.

1221032401444 is a deficient number, since it is larger than the sum of its proper divisors (973115823356).

1221032401444 is a wasteful number, since it uses less digits than its factorization.

1221032401444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17769723 (or 17769721 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 1221032401444 its reverse (4441042301221), we get a palindrome (5662074702665).

The spelling of 1221032401444 in words is "one trillion, two hundred twenty-one billion, thirty-two million, four hundred one thousand, four hundred forty-four".