105051920106121 has 2 divisors, whose sum is σ = 105051920106122. Its totient is φ = 105051920106120.

The previous prime is 105051920106109. The next prime is 105051920106139. The reversal of 105051920106121 is 121601029150501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88828457263225 + 16223462842896 = 9424885^2 + 4027836^2 .

It is an emirp because it is prime and its reverse (121601029150501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 105051920106121 - 2²⁹ = 105051383235209 is a prime.

It is a super-2 number, since 2×105051920106121² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105051923106121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52525960053060 + 52525960053061.

It is an arithmetic number, because the mean of its divisors is an integer number (52525960053061).

Almost surely, 2^{105051920106121} is an apocalyptic number.

It is an amenable number.

105051920106121 is a deficient number, since it is larger than the sum of its proper divisors (1).

105051920106121 is an equidigital number, since it uses as much as digits as its factorization.

105051920106121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 34.

Adding to 105051920106121 its reverse (121601029150501), we get a palindrome (226652949256622).

The spelling of 105051920106121 in words is "one hundred five trillion, fifty-one billion, nine hundred twenty million, one hundred six thousand, one hundred twenty-one".