102011121220121 has 2 divisors, whose sum is σ = 102011121220122. Its totient is φ = 102011121220120.

The previous prime is 102011121220109. The next prime is 102011121220139. The reversal of 102011121220121 is 121022121110201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88291957104400 + 13719164115721 = 9396380^2 + 3703939^2 .

It is a cyclic number.

It is not a de Polignac number, because 102011121220121 - 2¹⁰ = 102011121219097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 102011121220121.

It is not a weakly prime, because it can be changed into another prime (102011121220181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51005560610060 + 51005560610061.

It is an arithmetic number, because the mean of its divisors is an integer number (51005560610061).

Almost surely, 2^{102011121220121} is an apocalyptic number.

It is an amenable number.

102011121220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

102011121220121 is an equidigital number, since it uses as much as digits as its factorization.

102011121220121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 102011121220121 its reverse (121022121110201), we get a palindrome (223033242330322).

The spelling of 102011121220121 in words is "one hundred two trillion, eleven billion, one hundred twenty-one million, two hundred twenty thousand, one hundred twenty-one".