100421221204 has 24 divisors (see below), whose sum is σ = 176285037600. Its totient is φ = 50054137056.

The previous prime is 100421221193. The next prime is 100421221207. The reversal of 100421221204 is 402122124001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100421221207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11539647 + ... + 11548345.

It is an arithmetic number, because the mean of its divisors is an integer number (7345209900).

Almost surely, 2^100421221204 is an apocalyptic number.

It is an amenable number.

100421221204 is a deficient number, since it is larger than the sum of its proper divisors (75863816396).

100421221204 is a wasteful number, since it uses less digits than its factorization.

100421221204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17367 (or 17365 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 100421221204 its reverse (402122124001), we get a palindrome (502543345205).

The spelling of 100421221204 in words is "one hundred billion, four hundred twenty-one million, two hundred twenty-one thousand, two hundred four".