100231221204 has 60 divisors (see below), whose sum is σ = 262075812768. Its totient is φ = 33403827600.

The previous prime is 100231221187. The next prime is 100231221239. The reversal of 100231221204 is 402122132001.

It is a happy number.

100231221204 is a `hidden beast` number, since 10 + 0 + 231 + 221 + 204 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1783819 + ... + 1839149.

Almost surely, 2^100231221204 is an apocalyptic number.

It is an amenable number.

100231221204 is an abundant number, since it is smaller than the sum of its proper divisors (161844591564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100231221204 is a wasteful number, since it uses less digits than its factorization.

100231221204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60938 (or 60927 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 100231221204 its reverse (402122132001), we get a palindrome (502353353205).

The spelling of 100231221204 in words is "one hundred billion, two hundred thirty-one million, two hundred twenty-one thousand, two hundred four".