20001022100220 has 96 divisors (see below), whose sum is σ = 65088072000000. Its totient is φ = 4494176388864.

The previous prime is 20001022100219. The next prime is 20001022100239. The reversal of 20001022100220 is 2200122010002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20001022100196 and 20001022100205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 403547095 + ... + 403596654.

It is an arithmetic number, because the mean of its divisors is an integer number (678000750000).

Almost surely, 2^{20001022100220} is an apocalyptic number.

20001022100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001022100220 is an abundant number, since it is smaller than the sum of its proper divisors (45087049899780).

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

20001022100220 is a wasteful number, since it uses less digits than its factorization.

20001022100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807143827 (or 807143825 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20001022100220 its reverse (2200122010002), we get a palindrome (22201144110222).

The spelling of 20001022100220 in words is "twenty trillion, one billion, twenty-two million, one hundred thousand, two hundred twenty".