20102110121 has 2 divisors, whose sum is σ = 20102110122. Its totient is φ = 20102110120.

The previous prime is 20102110117. The next prime is 20102110187. The reversal of 20102110121 is 12101120102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14289572521 + 5812537600 = 119539^2 + 76240^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102110121 - 2² = 20102110117 is a prime.

It is not a weakly prime, because it can be changed into another prime (20102116121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051055060 + 10051055061.

It is an arithmetic number, because the mean of its divisors is an integer number (10051055061).

Almost surely, 2^20102110121 is an apocalyptic number.

It is an amenable number.

20102110121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102110121 is an equidigital number, since it uses as much as digits as its factorization.

20102110121 is an evil number, because the sum of its binary digits is even.

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

Adding to 20102110121 its reverse (12101120102), we get a palindrome (32203230223).

The spelling of 20102110121 in words is "twenty billion, one hundred two million, one hundred ten thousand, one hundred twenty-one".