20002120222120 has 16 divisors (see below), whose sum is σ = 45004770499860. Its totient is φ = 8000848088832.

The previous prime is 20002120222093. The next prime is 20002120222127. The reversal of 20002120222120 is 2122202120002.

It can be written as a sum of positive squares in 2 ways, for example, as 17605190789316 + 2396929432804 = 4195854^2 + 1548202^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20002120222094 and 20002120222103.

It is not an unprimeable number, because it can be changed into a prime (20002120222127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250026502737 + ... + 250026502816.

Almost surely, 2^{20002120222120} is an apocalyptic number.

20002120222120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002120222120 is an abundant number, since it is smaller than the sum of its proper divisors (25002650277740).

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

20002120222120 is a wasteful number, since it uses less digits than its factorization.

20002120222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500053005564 (or 500053005560 counting only the distinct ones).

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

Adding to 20002120222120 its reverse (2122202120002), we get a palindrome (22124322342122).

The spelling of 20002120222120 in words is "twenty trillion, two billion, one hundred twenty million, two hundred twenty-two thousand, one hundred twenty".