100333111221 has 24 divisors (see below), whose sum is σ = 165669979904. Its totient is φ = 57319112160.

The previous prime is 100333111217. The next prime is 100333111243. The reversal of 100333111221 is 122111333001.

100333111221 is a `hidden beast` number, since 1 + 0 + 0 + 333 + 111 + 221 = 666.

It is not a de Polignac number, because 100333111221 - 2² = 100333111217 is a prime.

It is a super-2 number, since 2×100333111221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100333111194 and 100333111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100333111321) 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, 65295 + ... + 452691.

Almost surely, 2^100333111221 is an apocalyptic number.

It is an amenable number.

100333111221 is a deficient number, since it is larger than the sum of its proper divisors (65336868683).

100333111221 is a wasteful number, since it uses less digits than its factorization.

100333111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391521 (or 391518 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 100333111221 its reverse (122111333001), we get a palindrome (222444444222).

The spelling of 100333111221 in words is "one hundred billion, three hundred thirty-three million, one hundred eleven thousand, two hundred twenty-one".