11123129 has 2 divisors, whose sum is σ = 11123130. Its totient is φ = 11123128.

The previous prime is 11123107. The next prime is 11123137. The reversal of 11123129 is 92132111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10738729 + 384400 = 3277^2 + 620^2 .

It is a cyclic number.

It is not a de Polignac number, because 11123129 - 2¹² = 11119033 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11123129.

It is not a weakly prime, because it can be changed into another prime (11123179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561564 + 5561565.

It is an arithmetic number, because the mean of its divisors is an integer number (5561565).

Almost surely, 2^11123129 is an apocalyptic number.

It is an amenable number.

11123129 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123129 is an equidigital number, since it uses as much as digits as its factorization.

11123129 is an evil number, because the sum of its binary digits is even.

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

The square root of 11123129 is about 3335.1355294800. The cubic root of 11123129 is about 223.2247394138.

The spelling of 11123129 in words is "eleven million, one hundred twenty-three thousand, one hundred twenty-nine".