20321101301220 has 72 divisors (see below), whose sum is σ = 61645333659000. Its totient is φ = 5418550702080.

The previous prime is 20321101301143. The next prime is 20321101301311. The reversal of 20321101301220 is 2210310112302.

20321101301220 is a `hidden beast` number, since 2 + 0 + 32 + 110 + 1 + 301 + 220 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3809897994816 + 16511203306404 = 1951896^2 + 4063398^2 .

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 = 20321101301193 and 20321101301202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1875691 + ... + 6645330.

Almost surely, 2^{20321101301220} is an apocalyptic number.

20321101301220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321101301220 is an abundant number, since it is smaller than the sum of its proper divisors (41324232357780).

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

20321101301220 is a wasteful number, since it uses less digits than its factorization.

20321101301220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8534285 (or 8534280 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20321101301220 its reverse (2210310112302), we get a palindrome (22531411413522).

The spelling of 20321101301220 in words is "twenty trillion, three hundred twenty-one billion, one hundred one million, three hundred one thousand, two hundred twenty".