102100121215121 has 2 divisors, whose sum is σ = 102100121215122. Its totient is φ = 102100121215120.

The previous prime is 102100121215051. The next prime is 102100121215151. The reversal of 102100121215121 is 121512121001201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67958771051521 + 34141350163600 = 8243711^2 + 5843060^2 .

It is a cyclic number.

It is not a de Polignac number, because 102100121215121 - 2⁴⁶ = 31731377037457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102100121215093 and 102100121215102.

It is not a weakly prime, because it can be changed into another prime (102100121215151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51050060607560 + 51050060607561.

It is an arithmetic number, because the mean of its divisors is an integer number (51050060607561).

Almost surely, 2^{102100121215121} is an apocalyptic number.

It is an amenable number.

102100121215121 is a deficient number, since it is larger than the sum of its proper divisors (1).

102100121215121 is an equidigital number, since it uses as much as digits as its factorization.

102100121215121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 20.

Adding to 102100121215121 its reverse (121512121001201), we get a palindrome (223612242216322).

The spelling of 102100121215121 in words is "one hundred two trillion, one hundred billion, one hundred twenty-one million, two hundred fifteen thousand, one hundred twenty-one".