1221434324001 has 12 divisors (see below), whose sum is σ = 1782482623012. Its totient is φ = 805894811136.

The previous prime is 1221434323999. The next prime is 1221434324003. The reversal of 1221434324001 is 1004234341221.

1221434324001 is a `hidden beast` number, since 1 + 2 + 214 + 3 + 43 + 2 + 400 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (1221434323999) and next prime (1221434324003).

It can be written as a sum of positive squares in 2 ways, for example, as 701910515601 + 519523808400 = 837801^2 + 720780^2 .

It is not a de Polignac number, because 1221434324001 - 2¹ = 1221434323999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221434324003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 699560596 + ... + 699562341.

Almost surely, 2^{1221434324001} is an apocalyptic number.

It is an amenable number.

1221434324001 is a deficient number, since it is larger than the sum of its proper divisors (561048299011).

1221434324001 is a wasteful number, since it uses less digits than its factorization.

1221434324001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399123040 (or 1399123037 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 1221434324001 its reverse (1004234341221), we get a palindrome (2225668665222).

The spelling of 1221434324001 in words is "one trillion, two hundred twenty-one billion, four hundred thirty-four million, three hundred twenty-four thousand, one".