121000012201001 has 2 divisors, whose sum is σ = 121000012201002. Its totient is φ = 121000012201000.

The previous prime is 121000012200989. The next prime is 121000012201091. The reversal of 121000012201001 is 100102210000121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120924089909401 + 75922291600 = 10996549^2 + 275540^2 .

It is a cyclic number.

It is not a de Polignac number, because 121000012201001 - 2⁶ = 121000012200937 is a prime.

It is not a weakly prime, because it can be changed into another prime (121000012201091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500006100500 + 60500006100501.

It is an arithmetic number, because the mean of its divisors is an integer number (60500006100501).

Almost surely, 2^{121000012201001} is an apocalyptic number.

It is an amenable number.

121000012201001 is a deficient number, since it is larger than the sum of its proper divisors (1).

121000012201001 is an equidigital number, since it uses as much as digits as its factorization.

121000012201001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121000012201001 its reverse (100102210000121), we get a palindrome (221102222201122).

The spelling of 121000012201001 in words is "one hundred twenty-one trillion, twelve million, two hundred one thousand, one".