20001012120101 has 2 divisors, whose sum is σ = 20001012120102. Its totient is φ = 20001012120100.

The previous prime is 20001012120079. The next prime is 20001012120233. The reversal of 20001012120101 is 10102121010002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19877196808225 + 123815311876 = 4458385^2 + 351874^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001012120101 - 2²² = 20001007925797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001012128101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000506060050 + 10000506060051.

It is an arithmetic number, because the mean of its divisors is an integer number (10000506060051).

Almost surely, 2^{20001012120101} is an apocalyptic number.

It is an amenable number.

20001012120101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001012120101 is an equidigital number, since it uses as much as digits as its factorization.

20001012120101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20001012120101 its reverse (10102121010002), we get a palindrome (30103133130103).

The spelling of 20001012120101 in words is "twenty trillion, one billion, twelve million, one hundred twenty thousand, one hundred one".