1200113129 has 2 divisors, whose sum is σ = 1200113130. Its totient is φ = 1200113128.

The previous prime is 1200113111. The next prime is 1200113141. The reversal of 1200113129 is 9213110021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1174912729 + 25200400 = 34277^2 + 5020^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200113129 - 2⁸ = 1200112873 is a prime.

It is a super-4 number, since 4×1200113129⁴ (a number of 37 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1200113129.

It is not a weakly prime, because it can be changed into another prime (1200113149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600056564 + 600056565.

It is an arithmetic number, because the mean of its divisors is an integer number (600056565).

Almost surely, 2^1200113129 is an apocalyptic number.

It is an amenable number.

1200113129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200113129 is an equidigital number, since it uses as much as digits as its factorization.

1200113129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 1200113129 is about 34642.6489893599. The cubic root of 1200113129 is about 1062.6919618836.

The spelling of 1200113129 in words is "one billion, two hundred million, one hundred thirteen thousand, one hundred twenty-nine".