100021200021020 has 12 divisors (see below), whose sum is σ = 210044520044184. Its totient is φ = 40008480008400.

The previous prime is 100021200020983. The next prime is 100021200021037. The reversal of 100021200021020 is 20120002120001.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 100021200020992 and 100021200021010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2500530000506 + ... + 2500530000545.

It is an arithmetic number, because the mean of its divisors is an integer number (17503710003682).

Almost surely, 2^{100021200021020} is an apocalyptic number.

100021200021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100021200021020 is an abundant number, since it is smaller than the sum of its proper divisors (110023320023164).

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

100021200021020 is a wasteful number, since it uses less digits than its factorization.

100021200021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5001060001060 (or 5001060001058 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 100021200021020 its reverse (20120002120001), we get a palindrome (120141202141021).

The spelling of 100021200021020 in words is "one hundred trillion, twenty-one billion, two hundred million, twenty-one thousand, twenty".