100020002000121 has 16 divisors (see below), whose sum is σ = 169346035132800. Its totient is φ = 57154286857104.

The previous prime is 100020002000101. The next prime is 100020002000129. The reversal of 100020002000121 is 121000200020001.

It is not a de Polignac number, because 100020002000121 - 2⁶ = 100020002000057 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (100020002000129) 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, 264603179706 + ... + 264603180083.

It is an arithmetic number, because the mean of its divisors is an integer number (10584127195800).

Almost surely, 2^{100020002000121} is an apocalyptic number.

It is an amenable number.

100020002000121 is a deficient number, since it is larger than the sum of its proper divisors (69326033132679).

100020002000121 is an equidigital number, since it uses as much as digits as its factorization.

100020002000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529206359805 (or 529206359799 counting only the distinct ones).

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

Adding to 100020002000121 its reverse (121000200020001), we get a palindrome (221020202020122).

The spelling of 100020002000121 in words is "one hundred trillion, twenty billion, two million, one hundred twenty-one", and thus it is an aban number.