1121211929 has 2 divisors, whose sum is σ = 1121211930. Its totient is φ = 1121211928.

The previous prime is 1121211901. The next prime is 1121211961. The reversal of 1121211929 is 9291121211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1119036304 + 2175625 = 33452^2 + 1475^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121211929 - 2¹⁶ = 1121146393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121211229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560605964 + 560605965.

It is an arithmetic number, because the mean of its divisors is an integer number (560605965).

Almost surely, 2^1121211929 is an apocalyptic number.

It is an amenable number.

1121211929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121211929 is an equidigital number, since it uses as much as digits as its factorization.

1121211929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 29.

The square root of 1121211929 is about 33484.5028184681. The cubic root of 1121211929 is about 1038.8732647589.

The spelling of 1121211929 in words is "one billion, one hundred twenty-one million, two hundred eleven thousand, nine hundred twenty-nine".