121001100211001 has 2 divisors, whose sum is σ = 121001100211002. Its totient is φ = 121001100211000.

The previous prime is 121001100210973. The next prime is 121001100211049. The reversal of 121001100211001 is 100112001100121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120991200160000 + 9900051001 = 10999600^2 + 99499^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121001100211001 is a prime.

It is not a weakly prime, because it can be changed into another prime (121001100211301) 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, 60500550105500 + 60500550105501.

It is an arithmetic number, because the mean of its divisors is an integer number (60500550105501).

Almost surely, 2^{121001100211001} is an apocalyptic number.

It is an amenable number.

121001100211001 is a deficient number, since it is larger than the sum of its proper divisors (1).

121001100211001 is an equidigital number, since it uses as much as digits as its factorization.

121001100211001 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 121001100211001 its reverse (100112001100121), we get a palindrome (221113101311122).

The spelling of 121001100211001 in words is "one hundred twenty-one trillion, one billion, one hundred million, two hundred eleven thousand, one".