100521211538 has 16 divisors (see below), whose sum is σ = 164899467360. Its totient is φ = 45577512000.

The previous prime is 100521211513. The next prime is 100521211541. The reversal of 100521211538 is 835112125001.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 100521211538.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5688368 + ... + 5706011.

It is an arithmetic number, because the mean of its divisors is an integer number (10306216710).

Almost surely, 2^100521211538 is an apocalyptic number.

100521211538 is a deficient number, since it is larger than the sum of its proper divisors (64378255822).

100521211538 is a wasteful number, since it uses less digits than its factorization.

100521211538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11394793.

The product of its (nonzero) digits is 2400, while the sum is 29.

Adding to 100521211538 its reverse (835112125001), we get a palindrome (935633336539).

The spelling of 100521211538 in words is "one hundred billion, five hundred twenty-one million, two hundred eleven thousand, five hundred thirty-eight".