1201210120001 has 2 divisors, whose sum is σ = 1201210120002. Its totient is φ = 1201210120000.

The previous prime is 1201210119983. The next prime is 1201210120051. The reversal of 1201210120001 is 1000210121021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1124821451776 + 76388668225 = 1060576^2 + 276385^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201210120001 - 2³⁴ = 1184030250817 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201210120051) 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, 600605060000 + 600605060001.

It is an arithmetic number, because the mean of its divisors is an integer number (600605060001).

Almost surely, 2^{1201210120001} is an apocalyptic number.

It is an amenable number.

1201210120001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201210120001 is an equidigital number, since it uses as much as digits as its factorization.

1201210120001 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 1201210120001 its reverse (1000210121021), we get a palindrome (2201420241022).

The spelling of 1201210120001 in words is "one trillion, two hundred one billion, two hundred ten million, one hundred twenty thousand, one".