121232020320 has 72 divisors (see below), whose sum is σ = 413704274256. Its totient is φ = 32328538368.

The previous prime is 121232020291. The next prime is 121232020337. The reversal of 121232020320 is 23020232121.

121232020320 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 320 + 20 + 320 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121232020293 and 121232020302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42093012 + ... + 42095891.

It is an arithmetic number, because the mean of its divisors is an integer number (5745892698).

Almost surely, 2^121232020320 is an apocalyptic number.

121232020320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121232020320 is an abundant number, since it is smaller than the sum of its proper divisors (292472253936).

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

121232020320 is a wasteful number, since it uses less digits than its factorization.

121232020320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84188924 (or 84188913 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 121232020320 its reverse (23020232121), we get a palindrome (144252252441).

The spelling of 121232020320 in words is "one hundred twenty-one billion, two hundred thirty-two million, twenty thousand, three hundred twenty".