20001100222220 has 144 divisors (see below), whose sum is σ = 49774141129440. Its totient is φ = 6692146864128.

The previous prime is 20001100222139. The next prime is 20001100222237. The reversal of 20001100222220 is 2222200110002.

It is a junction number, because it is equal to n+sod(n) for n = 20001100222195 and 20001100222204.

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, 1213589 + ... + 6440108.

Almost surely, 2^{20001100222220} is an apocalyptic number.

20001100222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001100222220 is an abundant number, since it is smaller than the sum of its proper divisors (29773040907220).

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

20001100222220 is a wasteful number, since it uses less digits than its factorization.

20001100222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7653784 (or 7653759 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20001100222220 its reverse (2222200110002), we get a palindrome (22223300332222).

The spelling of 20001100222220 in words is "twenty trillion, one billion, one hundred million, two hundred twenty-two thousand, two hundred twenty".