2112201100020 has 48 divisors (see below), whose sum is σ = 6451814271168. Its totient is φ = 512048751360.

The previous prime is 2112201100007. The next prime is 2112201100021. The reversal of 2112201100020 is 200011022112.

It is a super-2 number, since 2×2112201100020² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2112201099969 and 2112201100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112201100021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1600151689 + ... + 1600153008.

It is an arithmetic number, because the mean of its divisors is an integer number (134412797316).

Almost surely, 2^{2112201100020} is an apocalyptic number.

2112201100020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112201100020 is an abundant number, since it is smaller than the sum of its proper divisors (4339613171148).

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

2112201100020 is a wasteful number, since it uses less digits than its factorization.

2112201100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3200304720 (or 3200304718 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2112201100020 its reverse (200011022112), we get a palindrome (2312212122132).

The spelling of 2112201100020 in words is "two trillion, one hundred twelve billion, two hundred one million, one hundred thousand, twenty".