1321201223001 has 48 divisors (see below), whose sum is σ = 2094486413760. Its totient is φ = 795888466560.

The previous prime is 1321201222961. The next prime is 1321201223003. The reversal of 1321201223001 is 1003221021231.

1321201223001 is a `hidden beast` number, since 1 + 321 + 20 + 1 + 22 + 300 + 1 = 666.

It is not a de Polignac number, because 1321201223001 - 2⁶ = 1321201222937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321201223003) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 41327115 + ... + 41359071.

It is an arithmetic number, because the mean of its divisors is an integer number (43635133620).

Almost surely, 2^{1321201223001} is an apocalyptic number.

1321201223001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1321201223001 is a deficient number, since it is larger than the sum of its proper divisors (773285190759).

1321201223001 is a wasteful number, since it uses less digits than its factorization.

1321201223001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34486 (or 34483 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1321201223001 its reverse (1003221021231), we get a palindrome (2324422244232).

The spelling of 1321201223001 in words is "one trillion, three hundred twenty-one billion, two hundred one million, two hundred twenty-three thousand, one".