20021011222200 has 192 divisors, whose sum is σ = 62873238950400. Its totient is φ = 5269470336000.

The previous prime is 20021011222187. The next prime is 20021011222229. The reversal of 20021011222200 is 222211012002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20021011222200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 135063324 + ... + 135211476.

It is an arithmetic number, because the mean of its divisors is an integer number (327464786200).

Almost surely, 2^{20021011222200} is an apocalyptic number.

20021011222200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20021011222200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31436619475200).

20021011222200 is an abundant number, since it is smaller than the sum of its proper divisors (42852227728200).

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

20021011222200 is a wasteful number, since it uses less digits than its factorization.

20021011222200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151102 (or 151093 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20021011222200 its reverse (222211012002), we get a palindrome (20243222234202).

The spelling of 20021011222200 in words is "twenty trillion, twenty-one billion, eleven million, two hundred twenty-two thousand, two hundred".