2101220086 has 32 divisors (see below), whose sum is σ = 3675378240. Its totient is φ = 882251136.

The previous prime is 2101220081. The next prime is 2101220087. The reversal of 2101220086 is 6800221012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101220081) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 649120 + ... + 652348.

It is an arithmetic number, because the mean of its divisors is an integer number (114855570).

Almost surely, 2^2101220086 is an apocalyptic number.

2101220086 is a deficient number, since it is larger than the sum of its proper divisors (1574158154).

2101220086 is a wasteful number, since it uses less digits than its factorization.

2101220086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4168.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 2101220086 is about 45839.0672461820. The cubic root of 2101220086 is about 1280.8271196262.

Adding to 2101220086 its reverse (6800221012), we get a palindrome (8901441098).

The spelling of 2101220086 in words is "two billion, one hundred one million, two hundred twenty thousand, eighty-six".