1323101221000 has 64 divisors (see below), whose sum is σ = 3334215109680. Its totient is φ = 488529676800.

The previous prime is 1323101220997. The next prime is 1323101221021. The reversal of 1323101221000 is 1221013231.

It can be written as a sum of positive squares in 8 ways, for example, as 139892456484 + 1183208764516 = 374022^2 + 1087754^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50875509 + ... + 50901508.

Almost surely, 2^{1323101221000} is an apocalyptic number.

1323101221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323101221000 is an abundant number, since it is smaller than the sum of its proper divisors (2011113888680).

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

1323101221000 is a wasteful number, since it uses less digits than its factorization.

1323101221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101777051 (or 101777037 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1323101221000 its reverse (1221013231), we get a palindrome (1324322234231).

The spelling of 1323101221000 in words is "one trillion, three hundred twenty-three billion, one hundred one million, two hundred twenty-one thousand".