20310001012121 has 2 divisors, whose sum is σ = 20310001012122. Its totient is φ = 20310001012120.

The previous prime is 20310001012117. The next prime is 20310001012159. The reversal of 20310001012121 is 12121010001302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17098059600400 + 3211941411721 = 4134980^2 + 1792189^2 .

It is a cyclic number.

It is not a de Polignac number, because 20310001012121 - 2² = 20310001012117 is a prime.

It is a super-3 number, since 3×20310001012121³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 20310001012096 and 20310001012105.

It is not a weakly prime, because it can be changed into another prime (20310001012321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155000506060 + 10155000506061.

It is an arithmetic number, because the mean of its divisors is an integer number (10155000506061).

Almost surely, 2^{20310001012121} is an apocalyptic number.

It is an amenable number.

20310001012121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20310001012121 is an equidigital number, since it uses as much as digits as its factorization.

20310001012121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20310001012121 its reverse (12121010001302), we get a palindrome (32431011013423).

The spelling of 20310001012121 in words is "twenty trillion, three hundred ten billion, one million, twelve thousand, one hundred twenty-one".