100221122138 has 48 divisors (see below), whose sum is σ = 161178400800. Its totient is φ = 46604224800.

The previous prime is 100221122137. The next prime is 100221122161. The reversal of 100221122138 is 831221122001.

It is not an unprimeable number, because it can be changed into a prime (100221122137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61902293 + ... + 61903911.

It is an arithmetic number, because the mean of its divisors is an integer number (3357883350).

Almost surely, 2^100221122138 is an apocalyptic number.

100221122138 is a deficient number, since it is larger than the sum of its proper divisors (60957278662).

100221122138 is a wasteful number, since it uses less digits than its factorization.

100221122138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995 (or 1868 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 100221122138 its reverse (831221122001), we get a palindrome (931442244139).

The spelling of 100221122138 in words is "one hundred billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred thirty-eight".