121321101130020 has 144 divisors (see below), whose sum is σ = 414412957969920. Its totient is φ = 28462428403200.

The previous prime is 121321101129929. The next prime is 121321101130057. The reversal of 121321101130020 is 20031101123121.

121321101130020 is a `hidden beast` number, since 1 + 2 + 1 + 321 + 10 + 11 + 300 + 20 = 666.

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 = 121321101129975 and 121321101130002.

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 47 ways as a sum of consecutive naturals, for example, 988217385 + ... + 988340144.

It is an arithmetic number, because the mean of its divisors is an integer number (2877867763680).

Almost surely, 2^{121321101130020} is an apocalyptic number.

121321101130020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121321101130020 is an abundant number, since it is smaller than the sum of its proper divisors (293091856839900).

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

121321101130020 is a wasteful number, since it uses less digits than its factorization.

121321101130020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976557586 (or 1976557581 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 121321101130020 its reverse (20031101123121), we get a palindrome (141352202253141).

The spelling of 121321101130020 in words is "one hundred twenty-one trillion, three hundred twenty-one billion, one hundred one million, one hundred thirty thousand, twenty".