102101644 has 12 divisors (see below), whose sum is σ = 183036168. Its totient is φ = 49805600.

The previous prime is 102101641. The next prime is 102101723. The reversal of 102101644 is 446101201.

It is not an unprimeable number, because it can be changed into a prime (102101641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311122 + ... + 311449.

It is an arithmetic number, because the mean of its divisors is an integer number (15253014).

Almost surely, 2^102101644 is an apocalyptic number.

It is an amenable number.

102101644 is a deficient number, since it is larger than the sum of its proper divisors (80934524).

102101644 is a wasteful number, since it uses less digits than its factorization.

102101644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622616 (or 622614 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 102101644 is about 10104.5358131881. The cubic root of 102101644 is about 467.3880220239.

Adding to 102101644 its reverse (446101201), we get a palindrome (548202845).

The spelling of 102101644 in words is "one hundred two million, one hundred one thousand, six hundred forty-four".