2131100220 has 24 divisors (see below), whose sum is σ = 5967080784. Its totient is φ = 568293376.

The previous prime is 2131100203. The next prime is 2131100243. The reversal of 2131100220 is 220011312.

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 = 2131100196 and 2131100205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17759109 + ... + 17759228.

It is an arithmetic number, because the mean of its divisors is an integer number (248628366).

Almost surely, 2^2131100220 is an apocalyptic number.

2131100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131100220 is an abundant number, since it is smaller than the sum of its proper divisors (3835980564).

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

2131100220 is a wasteful number, since it uses less digits than its factorization.

2131100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35518349 (or 35518347 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2131100220 is about 46163.8410446964. The cubic root of 2131100220 is about 1286.8698461508.

Adding to 2131100220 its reverse (220011312), we get a palindrome (2351111532).

The spelling of 2131100220 in words is "two billion, one hundred thirty-one million, one hundred thousand, two hundred twenty".