100021221100120 has 64 divisors (see below), whose sum is σ = 225167131692000. Its totient is φ = 39987266930688.

The previous prime is 100021221100081. The next prime is 100021221100123. The reversal of 100021221100120 is 21001122120001.

It is a self number, because there is not a number n which added to its sum of digits gives 100021221100120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021221100123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2193954286 + ... + 2193999874.

Almost surely, 2^{100021221100120} is an apocalyptic number.

100021221100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100021221100120 is an abundant number, since it is smaller than the sum of its proper divisors (125145910591880).

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

100021221100120 is a wasteful number, since it uses less digits than its factorization.

100021221100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73492 (or 73488 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 100021221100120 its reverse (21001122120001), we get a palindrome (121022343220121).

The spelling of 100021221100120 in words is "one hundred trillion, twenty-one billion, two hundred twenty-one million, one hundred thousand, one hundred twenty".