20101000121 has 8 divisors (see below), whose sum is σ = 20980135680. Its totient is φ = 19222296192.

The previous prime is 20101000099. The next prime is 20101000159. The reversal of 20101000121 is 12100010102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20101000121 - 2¹⁰ = 20100999097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20101000099 and 20101000108.

It is not an unprimeable number, because it can be changed into a prime (20101003121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10865 + ... + 200798.

It is an arithmetic number, because the mean of its divisors is an integer number (2622516960).

Almost surely, 2^20101000121 is an apocalyptic number.

It is an amenable number.

20101000121 is a deficient number, since it is larger than the sum of its proper divisors (879135559).

20101000121 is a wasteful number, since it uses less digits than its factorization.

20101000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215815.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20101000121 its reverse (12100010102), we get a palindrome (32201010223).

The spelling of 20101000121 in words is "twenty billion, one hundred one million, one hundred twenty-one", and thus it is an aban number.