100243213221 has 16 divisors (see below), whose sum is σ = 137341366848. Its totient is φ = 64988812800.

The previous prime is 100243213201. The next prime is 100243213223. The reversal of 100243213221 is 122312342001.

It is not a de Polignac number, because 100243213221 - 2⁹ = 100243212709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100243213223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19500 + ... + 448181.

It is an arithmetic number, because the mean of its divisors is an integer number (8583835428).

Almost surely, 2^100243213221 is an apocalyptic number.

It is an amenable number.

100243213221 is a deficient number, since it is larger than the sum of its proper divisors (37098153627).

100243213221 is a wasteful number, since it uses less digits than its factorization.

100243213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469652.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 100243213221 its reverse (122312342001), we get a palindrome (222555555222).

The spelling of 100243213221 in words is "one hundred billion, two hundred forty-three million, two hundred thirteen thousand, two hundred twenty-one".