1201001129 has 2 divisors, whose sum is σ = 1201001130. Its totient is φ = 1201001128.

The previous prime is 1201001111. The next prime is 1201001209. The reversal of 1201001129 is 9211001021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 701031529 + 499969600 = 26477^2 + 22360^2 .

It is an emirp because it is prime and its reverse (9211001021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1201001129 - 2²⁰ = 1199952553 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1201001029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600500564 + 600500565.

It is an arithmetic number, because the mean of its divisors is an integer number (600500565).

Almost surely, 2^1201001129 is an apocalyptic number.

It is an amenable number.

1201001129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201001129 is an equidigital number, since it uses as much as digits as its factorization.

1201001129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 1201001129 is about 34655.4631912488. The cubic root of 1201001129 is about 1062.9540032376.

The spelling of 1201001129 in words is "one billion, two hundred one million, one thousand, one hundred twenty-nine".