102020122121 has 2 divisors, whose sum is σ = 102020122122. Its totient is φ = 102020122120.

The previous prime is 102020122103. The next prime is 102020122133. The reversal of 102020122121 is 121221020201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65876408896 + 36143713225 = 256664^2 + 190115^2 .

It is a cyclic number.

It is not a de Polignac number, because 102020122121 - 2²² = 102015927817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102020122096 and 102020122105.

It is not a weakly prime, because it can be changed into another prime (102028122121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010061060 + 51010061061.

It is an arithmetic number, because the mean of its divisors is an integer number (51010061061).

Almost surely, 2^102020122121 is an apocalyptic number.

It is an amenable number.

102020122121 is a deficient number, since it is larger than the sum of its proper divisors (1).

102020122121 is an equidigital number, since it uses as much as digits as its factorization.

102020122121 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 14.

Adding to 102020122121 its reverse (121221020201), we get a palindrome (223241142322).

The spelling of 102020122121 in words is "one hundred two billion, twenty million, one hundred twenty-two thousand, one hundred twenty-one".