100031032221 has 32 divisors (see below), whose sum is σ = 138922426368. Its totient is φ = 63953608320.

The previous prime is 100031032183. The next prime is 100031032261. The reversal of 100031032221 is 122230130001.

It is not a de Polignac number, because 100031032221 - 2¹¹ = 100031030173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100031032221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100031032261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11251440 + ... + 11260326.

It is an arithmetic number, because the mean of its divisors is an integer number (4341325824).

Almost surely, 2^100031032221 is an apocalyptic number.

It is an amenable number.

100031032221 is a deficient number, since it is larger than the sum of its proper divisors (38891394147).

100031032221 is a wasteful number, since it uses less digits than its factorization.

100031032221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10001.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 100031032221 its reverse (122230130001), we get a palindrome (222261162222).

The spelling of 100031032221 in words is "one hundred billion, thirty-one million, thirty-two thousand, two hundred twenty-one".