20002101220 has 48 divisors (see below), whose sum is σ = 42381158400. Its totient is φ = 7929218304.

The previous prime is 20002101209. The next prime is 20002101227. The reversal of 20002101220 is 2210120002.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20002101197 and 20002101206.

It is not an unprimeable number, because it can be changed into a prime (20002101227) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2660707 + ... + 2668213.

It is an arithmetic number, because the mean of its divisors is an integer number (882940800).

Almost surely, 2^20002101220 is an apocalyptic number.

20002101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002101220 is an abundant number, since it is smaller than the sum of its proper divisors (22379057180).

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

20002101220 is a wasteful number, since it uses less digits than its factorization.

20002101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8692 (or 8690 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20002101220 its reverse (2210120002), we get a palindrome (22212221222).

The spelling of 20002101220 in words is "twenty billion, two million, one hundred one thousand, two hundred twenty".