121001212110001 has 2 divisors, whose sum is σ = 121001212110002. Its totient is φ = 121001212110000.

The previous prime is 121001212109993. The next prime is 121001212110017. The reversal of 121001212110001 is 100011212100121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62964240870001 + 58036971240000 = 7935001^2 + 7618200^2 .

It is a cyclic number.

It is not a de Polignac number, because 121001212110001 - 2³ = 121001212109993 is a prime.

It is not a weakly prime, because it can be changed into another prime (121001212110061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500606055000 + 60500606055001.

It is an arithmetic number, because the mean of its divisors is an integer number (60500606055001).

Almost surely, 2^{121001212110001} is an apocalyptic number.

It is an amenable number.

121001212110001 is a deficient number, since it is larger than the sum of its proper divisors (1).

121001212110001 is an equidigital number, since it uses as much as digits as its factorization.

121001212110001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121001212110001 its reverse (100011212100121), we get a palindrome (221012424210122).

The spelling of 121001212110001 in words is "one hundred twenty-one trillion, one billion, two hundred twelve million, one hundred ten thousand, one".