121210010010101 has 2 divisors, whose sum is σ = 121210010010102. Its totient is φ = 121210010010100.

The previous prime is 121210010010053. The next prime is 121210010010113. The reversal of 121210010010101 is 101010010012121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109106360269201 + 12103649740900 = 10445399^2 + 3479030^2 .

It is a cyclic number.

It is not a de Polignac number, because 121210010010101 - 2¹⁴ = 121210009993717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121210010010151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605005005050 + 60605005005051.

It is an arithmetic number, because the mean of its divisors is an integer number (60605005005051).

Almost surely, 2^{121210010010101} is an apocalyptic number.

It is an amenable number.

121210010010101 is a deficient number, since it is larger than the sum of its proper divisors (1).

121210010010101 is an equidigital number, since it uses as much as digits as its factorization.

121210010010101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 121210010010101 its reverse (101010010012121), we get a palindrome (222220020022222).

The spelling of 121210010010101 in words is "one hundred twenty-one trillion, two hundred ten billion, ten million, ten thousand, one hundred one".