61121129 has 2 divisors, whose sum is σ = 61121130. Its totient is φ = 61121128.

The previous prime is 61121113. The next prime is 61121147. The reversal of 61121129 is 92112116.

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., 54361129 + 6760000 = 7373^2 + 2600^2 .

It is a cyclic number.

It is not a de Polignac number, because 61121129 - 2⁴ = 61121113 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (61121029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30560564 + 30560565.

It is an arithmetic number, because the mean of its divisors is an integer number (30560565).

Almost surely, 2^61121129 is an apocalyptic number.

It is an amenable number.

61121129 is a deficient number, since it is larger than the sum of its proper divisors (1).

61121129 is an equidigital number, since it uses as much as digits as its factorization.

61121129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 23.

The square root of 61121129 is about 7818.0003197749. Note that the first 3 decimals coincide. The cubic root of 61121129 is about 393.9101055790.

The spelling of 61121129 in words is "sixty-one million, one hundred twenty-one thousand, one hundred twenty-nine".