1320232121220 has 48 divisors (see below), whose sum is σ = 3697157072448. Its totient is φ = 352013600640.

The previous prime is 1320232121213. The next prime is 1320232121267. The reversal of 1320232121220 is 221212320231.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1067251 + ... + 1944090.

It is an arithmetic number, because the mean of its divisors is an integer number (77024105676).

Almost surely, 2^{1320232121220} is an apocalyptic number.

1320232121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320232121220 is an abundant number, since it is smaller than the sum of its proper divisors (2376924951228).

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

1320232121220 is a wasteful number, since it uses less digits than its factorization.

1320232121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3018660 (or 3018658 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 1320232121220 its reverse (221212320231), we get a palindrome (1541444441451).

The spelling of 1320232121220 in words is "one trillion, three hundred twenty billion, two hundred thirty-two million, one hundred twenty-one thousand, two hundred twenty".