1221323001332 has 48 divisors (see below), whose sum is σ = 2527792985088. Its totient is φ = 505263432960.

The previous prime is 1221323001319. The next prime is 1221323001377. The reversal of 1221323001332 is 2331003231221.

It is a junction number, because it is equal to n+sod(n) for n = 1221323001298 and 1221323001307.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1427513 + ... + 2116704.

It is an arithmetic number, because the mean of its divisors is an integer number (52662353856).

Almost surely, 2^{1221323001332} is an apocalyptic number.

It is an amenable number.

1221323001332 is an abundant number, since it is smaller than the sum of its proper divisors (1306469983756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221323001332 is a wasteful number, since it uses less digits than its factorization.

1221323001332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3544656 (or 3544654 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1221323001332 its reverse (2331003231221), we get a palindrome (3552326232553).

The spelling of 1221323001332 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-three million, one thousand, three hundred thirty-two".