1221043331324 has 6 divisors (see below), whose sum is σ = 2136825829824. Its totient is φ = 610521665660.

The previous prime is 1221043331281. The next prime is 1221043331381. The reversal of 1221043331324 is 4231333401221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152630416412 + ... + 152630416419.

It is an arithmetic number, because the mean of its divisors is an integer number (356137638304).

Almost surely, 2^{1221043331324} is an apocalyptic number.

It is an amenable number.

1221043331324 is a deficient number, since it is larger than the sum of its proper divisors (915782498500).

1221043331324 is a wasteful number, since it uses less digits than its factorization.

1221043331324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305260832835 (or 305260832833 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 1221043331324 its reverse (4231333401221), we get a palindrome (5452376732545).

The spelling of 1221043331324 in words is "one trillion, two hundred twenty-one billion, forty-three million, three hundred thirty-one thousand, three hundred twenty-four".