100200121021 has 48 divisors (see below), whose sum is σ = 137046349440. Its totient is φ = 72014382720.

The previous prime is 100200121019. The next prime is 100200121033. The reversal of 100200121021 is 120121002001.

It is not a de Polignac number, because 100200121021 - 2¹ = 100200121019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100200120989 and 100200121007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100200125021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10008000 + ... + 10018006.

It is an arithmetic number, because the mean of its divisors is an integer number (2855132280).

Almost surely, 2^100200121021 is an apocalyptic number.

100200121021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100200121021 is a deficient number, since it is larger than the sum of its proper divisors (36846228419).

100200121021 is a wasteful number, since it uses less digits than its factorization.

100200121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11474 (or 11467 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 100200121021 its reverse (120121002001), we get a palindrome (220321123022).

The spelling of 100200121021 in words is "one hundred billion, two hundred million, one hundred twenty-one thousand, twenty-one".