1201000121029 has 2 divisors, whose sum is σ = 1201000121030. Its totient is φ = 1201000121028.

The previous prime is 1201000121021. The next prime is 1201000121063. The reversal of 1201000121029 is 9201210001021.

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., 761470900129 + 439529220900 = 872623^2 + 662970^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201000121029 - 2³ = 1201000121021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201000120997 and 1201000121015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201000121021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600500060514 + 600500060515.

It is an arithmetic number, because the mean of its divisors is an integer number (600500060515).

Almost surely, 2^{1201000121029} is an apocalyptic number.

It is an amenable number.

1201000121029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201000121029 is an equidigital number, since it uses as much as digits as its factorization.

1201000121029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 1201000121029 in words is "one trillion, two hundred one billion, one hundred twenty-one thousand, twenty-nine".