2101244985 has 48 divisors (see below), whose sum is σ = 4274989056. Its totient is φ = 934602624.

The previous prime is 2101244983. The next prime is 2101245023. The reversal of 2101244985 is 5894421012.

It is not a de Polignac number, because 2101244985 - 2¹ = 2101244983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2101244983) 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 47 ways as a sum of consecutive naturals, for example, 78489 + ... + 101798.

It is an arithmetic number, because the mean of its divisors is an integer number (89062272).

Almost surely, 2^2101244985 is an apocalyptic number.

It is an amenable number.

2101244985 is an abundant number, since it is smaller than the sum of its proper divisors (2173744071).

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

2101244985 is a wasteful number, since it uses less digits than its factorization.

2101244985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180342 (or 180339 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 2101244985 is about 45839.3388368550. The cubic root of 2101244985 is about 1280.8321787803.

Adding to 2101244985 its reverse (5894421012), we get a palindrome (7995665997).

The spelling of 2101244985 in words is "two billion, one hundred one million, two hundred forty-four thousand, nine hundred eighty-five".