100021221076 has 12 divisors (see below), whose sum is σ = 200042442208. Its totient is φ = 42866237592.

The previous prime is 100021221071. The next prime is 100021221077. The reversal of 100021221076 is 670122120001.

It is a happy number.

100021221076 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021221071) 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, 1786093206 + ... + 1786093261.

Almost surely, 2^100021221076 is an apocalyptic number.

It is an amenable number.

100021221076 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

100021221076 is a wasteful number, since it uses less digits than its factorization.

100021221076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3572186478 (or 3572186476 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 100021221076 its reverse (670122120001), we get a palindrome (770143341077).

The spelling of 100021221076 in words is "one hundred billion, twenty-one million, two hundred twenty-one thousand, seventy-six".