20101012110121 has 4 divisors (see below), whose sum is σ = 20101312098244. Its totient is φ = 20100712122000.

The previous prime is 20101012110119. The next prime is 20101012110199. The reversal of 20101012110121 is 12101121010102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1884206456896 + 18216805653225 = 1372664^2 + 4268115^2 .

It is a cyclic number.

It is not a de Polignac number, because 20101012110121 - 2¹ = 20101012110119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20101012110521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149893530 + ... + 150027571.

It is an arithmetic number, because the mean of its divisors is an integer number (5025328024561).

Almost surely, 2^{20101012110121} is an apocalyptic number.

It is an amenable number.

20101012110121 is a deficient number, since it is larger than the sum of its proper divisors (299988123).

20101012110121 is an equidigital number, since it uses as much as digits as its factorization.

20101012110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299988122.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20101012110121 its reverse (12101121010102), we get a palindrome (32202133120223).

The spelling of 20101012110121 in words is "twenty trillion, one hundred one billion, twelve million, one hundred ten thousand, one hundred twenty-one".