1323121310220 has 24 divisors (see below), whose sum is σ = 3704739668784. Its totient is φ = 352832349376.

The previous prime is 1323121310209. The next prime is 1323121310249. The reversal of 1323121310220 is 220131213231.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11026010859 + ... + 11026010978.

It is an arithmetic number, because the mean of its divisors is an integer number (154364152866).

Almost surely, 2^{1323121310220} is an apocalyptic number.

1323121310220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323121310220 is an abundant number, since it is smaller than the sum of its proper divisors (2381618358564).

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

1323121310220 is a wasteful number, since it uses less digits than its factorization.

1323121310220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22052021849 (or 22052021847 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1323121310220 its reverse (220131213231), we get a palindrome (1543252523451).

The spelling of 1323121310220 in words is "one trillion, three hundred twenty-three billion, one hundred twenty-one million, three hundred ten thousand, two hundred twenty".