20012100112220 has 24 divisors (see below), whose sum is σ = 42033050061408. Its totient is φ = 8003384840000.

The previous prime is 20012100112219. The next prime is 20012100112223. The reversal of 20012100112220 is 2221100121002.

It is a junction number, because it is equal to n+sod(n) for n = 20012100112195 and 20012100112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012100112223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90837536 + ... + 91057575.

It is an arithmetic number, because the mean of its divisors is an integer number (1751377085892).

Almost surely, 2^{20012100112220} is an apocalyptic number.

20012100112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012100112220 is an abundant number, since it is smaller than the sum of its proper divisors (22020949949188).

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

20012100112220 is a wasteful number, since it uses less digits than its factorization.

20012100112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181900621 (or 181900619 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20012100112220 its reverse (2221100121002), we get a palindrome (22233200233222).

The spelling of 20012100112220 in words is "twenty trillion, twelve billion, one hundred million, one hundred twelve thousand, two hundred twenty".