100021009857872 has 40 divisors (see below), whose sum is σ = 194237186774400. Its totient is φ = 49895290161792.

The previous prime is 100021009857871. The next prime is 100021009858013. The reversal of 100021009857872 is 278758900120001.

It is a self number, because there is not a number n which added to its sum of digits gives 100021009857872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021009857871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306568013 + ... + 306894099.

It is an arithmetic number, because the mean of its divisors is an integer number (4855929669360).

Almost surely, 2^{100021009857872} is an apocalyptic number.

It is an amenable number.

100021009857872 is a deficient number, since it is larger than the sum of its proper divisors (94216176916528).

100021009857872 is a wasteful number, since it uses less digits than its factorization.

100021009857872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370203 (or 370197 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 50.

Adding to 100021009857872 its reverse (278758900120001), we get a palindrome (378779909977873).

The spelling of 100021009857872 in words is "one hundred trillion, twenty-one billion, nine million, eight hundred fifty-seven thousand, eight hundred seventy-two".