20002221222100 has 36 divisors (see below), whose sum is σ = 46743652366684. Its totient is φ = 7385435527680.

The previous prime is 20002221222043. The next prime is 20002221222169. The reversal of 20002221222100 is 122212220002.

It can be written as a sum of positive squares in 6 ways, for example, as 195431189776 + 19806790032324 = 442076^2 + 4450482^2 .

It is a super-3 number, since 3×20002221222100³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7693160709 + ... + 7693163308.

Almost surely, 2^{20002221222100} is an apocalyptic number.

20002221222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002221222100 is an abundant number, since it is smaller than the sum of its proper divisors (26741431144584).

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

20002221222100 is a wasteful number, since it uses less digits than its factorization.

20002221222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15386324044 (or 15386324037 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20002221222100 its reverse (122212220002), we get a palindrome (20124433442102).

The spelling of 20002221222100 in words is "twenty trillion, two billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred".