100021000021200 has 180 divisors, whose sum is σ = 352983716361120. Its totient is φ = 26220194300160.

The previous prime is 100021000021127. The next prime is 100021000021207. The reversal of 100021000021200 is 2120000120001.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021000021207) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 235241932 + ... + 235666731.

Almost surely, 2^{100021000021200} is an apocalyptic number.

100021000021200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100021000021200 is an abundant number, since it is smaller than the sum of its proper divisors (252962716339920).

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

100021000021200 is a wasteful number, since it uses less digits than its factorization.

100021000021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470908746 (or 470908732 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 100021000021200 its reverse (2120000120001), we get a palindrome (102141000141201).

The spelling of 100021000021200 in words is "one hundred trillion, twenty-one billion, twenty-one thousand, two hundred".