100033031221 has 4 divisors (see below), whose sum is σ = 104382293472. Its totient is φ = 95683768972.

The previous prime is 100033031191. The next prime is 100033031233. The reversal of 100033031221 is 122130330001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122130330001 = 4493 ⋅27182357.

It is a cyclic number.

It is not a de Polignac number, because 100033031221 - 2¹⁵ = 100032998453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100033031195 and 100033031204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100033031291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2174631091 + ... + 2174631136.

It is an arithmetic number, because the mean of its divisors is an integer number (26095573368).

Almost surely, 2^100033031221 is an apocalyptic number.

It is an amenable number.

100033031221 is a deficient number, since it is larger than the sum of its proper divisors (4349262251).

100033031221 is an equidigital number, since it uses as much as digits as its factorization.

100033031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4349262250.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 100033031221 its reverse (122130330001), we get a palindrome (222163361222).

The spelling of 100033031221 in words is "one hundred billion, thirty-three million, thirty-one thousand, two hundred twenty-one".