20013100021220 has 48 divisors (see below), whose sum is σ = 42263344142208. Its totient is φ = 7960422624000.

The previous prime is 20013100021169. The next prime is 20013100021301. The reversal of 20013100021220 is 2212000131002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20013100021195 and 20013100021204.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133352 + ... + 6328031.

It is an arithmetic number, because the mean of its divisors is an integer number (880486336296).

Almost surely, 2^{20013100021220} is an apocalyptic number.

20013100021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20013100021220 is an abundant number, since it is smaller than the sum of its proper divisors (22250244120988).

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

20013100021220 is a wasteful number, since it uses less digits than its factorization.

20013100021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6462260 (or 6462258 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20013100021220 its reverse (2212000131002), we get a palindrome (22225100152222).

The spelling of 20013100021220 in words is "twenty trillion, thirteen billion, one hundred million, twenty-one thousand, two hundred twenty".