2111200129 has 2 divisors, whose sum is σ = 2111200130. Its totient is φ = 2111200128.

The previous prime is 2111200051. The next prime is 2111200159. The reversal of 2111200129 is 9210021112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1725156225 + 386043904 = 41535^2 + 19648^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111200129 - 2⁷ = 2111200001 is a prime.

It is not a weakly prime, because it can be changed into another prime (2111200159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055600064 + 1055600065.

It is an arithmetic number, because the mean of its divisors is an integer number (1055600065).

Almost surely, 2^2111200129 is an apocalyptic number.

It is an amenable number.

2111200129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111200129 is an equidigital number, since it uses as much as digits as its factorization.

2111200129 is an evil number, because the sum of its binary digits is even.

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

The square root of 2111200129 is about 45947.7978688859. The cubic root of 2111200129 is about 1282.8517409851.

The spelling of 2111200129 in words is "two billion, one hundred eleven million, two hundred thousand, one hundred twenty-nine".