100021144 has 8 divisors (see below), whose sum is σ = 187539660. Its totient is φ = 50010568.

The previous prime is 100021133. The next prime is 100021153. The reversal of 100021144 is 441120001.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6251314 + ... + 6251329.

Almost surely, 2^100021144 is an apocalyptic number.

It is an amenable number.

100021144 is a deficient number, since it is larger than the sum of its proper divisors (87518516).

100021144 is a wasteful number, since it uses less digits than its factorization.

100021144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12502649 (or 12502645 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 100021144 is about 10001.0571441223. The cubic root of 100021144 is about 464.1915949740.

Adding to 100021144 its reverse (441120001), we get a palindrome (541141145).

The spelling of 100021144 in words is "one hundred million, twenty-one thousand, one hundred forty-four".