20121010200220 has 12 divisors (see below), whose sum is σ = 42254121420504. Its totient is φ = 8048404080080.

The previous prime is 20121010200217. The next prime is 20121010200259. The reversal of 20121010200220 is 2200201012102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20121010200220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503025254986 + ... + 503025255025.

It is an arithmetic number, because the mean of its divisors is an integer number (3521176785042).

Almost surely, 2^{20121010200220} is an apocalyptic number.

20121010200220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121010200220 is an abundant number, since it is smaller than the sum of its proper divisors (22133111220284).

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

20121010200220 is a wasteful number, since it uses less digits than its factorization.

20121010200220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006050510020 (or 1006050510018 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20121010200220 its reverse (2200201012102), we get a palindrome (22321211212322).

The spelling of 20121010200220 in words is "twenty trillion, one hundred twenty-one billion, ten million, two hundred thousand, two hundred twenty".