2101242220 has 96 divisors (see below), whose sum is σ = 5577094656. Its totient is φ = 645926400.

The previous prime is 2101242181. The next prime is 2101242271. The reversal of 2101242220 is 222421012.

It is a super-2 number, since 2×2101242220² = 8830437734221056800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2101242194 and 2101242203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103075 + ... + 121765.

It is an arithmetic number, because the mean of its divisors is an integer number (58094736).

Almost surely, 2^2101242220 is an apocalyptic number.

2101242220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2101242220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2788547328).

2101242220 is an abundant number, since it is smaller than the sum of its proper divisors (3475852436).

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

2101242220 is a wasteful number, since it uses less digits than its factorization.

2101242220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18791 (or 18789 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2101242220 is about 45839.3086771605. The cubic root of 2101242220 is about 1280.8316169701.

Adding to 2101242220 its reverse (222421012), we get a palindrome (2323663232).

The spelling of 2101242220 in words is "two billion, one hundred one million, two hundred forty-two thousand, two hundred twenty".