20012220222100 has 18 divisors (see below), whose sum is σ = 43426517882174. Its totient is φ = 8004888088800.

The previous prime is 20012220222097. The next prime is 20012220222101. The reversal of 20012220222100 is 122202221002.

It can be written as a sum of positive squares in 3 ways, for example, as 1341144654084 + 18671075568016 = 1158078^2 + 4321004^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012220222101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100061101011 + ... + 100061101210.

Almost surely, 2^{20012220222100} is an apocalyptic number.

20012220222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012220222100 is an abundant number, since it is smaller than the sum of its proper divisors (23414297660074).

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

20012220222100 is a wasteful number, since it uses less digits than its factorization.

20012220222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200122202235 (or 200122202228 counting only the distinct ones).

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

Adding to 20012220222100 its reverse (122202221002), we get a palindrome (20134422443102).

The spelling of 20012220222100 in words is "twenty trillion, twelve billion, two hundred twenty million, two hundred twenty-two thousand, one hundred".