20102000121 has 20 divisors (see below), whose sum is σ = 34318759552. Its totient is φ = 11486856888.

The previous prime is 20102000111. The next prime is 20102000129. The reversal of 20102000121 is 12100020102.

It is not a de Polignac number, because 20102000121 - 2¹⁰ = 20101999097 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 (20102000129) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 17726065 + ... + 17727198.

Almost surely, 2^20102000121 is an apocalyptic number.

20102000121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20102000121 is a deficient number, since it is larger than the sum of its proper divisors (14216759431).

20102000121 is an equidigital number, since it uses as much as digits as its factorization.

20102000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35453282 (or 35453273 counting only the distinct ones).

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

Adding to 20102000121 its reverse (12100020102), we get a palindrome (32202020223).

The spelling of 20102000121 in words is "twenty billion, one hundred two million, one hundred twenty-one", and thus it is an aban number.