1102121689 has 2 divisors, whose sum is σ = 1102121690. Its totient is φ = 1102121688.

The previous prime is 1102121623. The next prime is 1102121717. The reversal of 1102121689 is 9861212011.

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., 722534400 + 379587289 = 26880^2 + 19483^2 .

It is a cyclic number.

It is not a de Polignac number, because 1102121689 - 2¹⁵ = 1102088921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1102121689.

It is not a weakly prime, because it can be changed into another prime (1102121389) 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, 551060844 + 551060845.

It is an arithmetic number, because the mean of its divisors is an integer number (551060845).

Almost surely, 2^1102121689 is an apocalyptic number.

It is an amenable number.

1102121689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1102121689 is an equidigital number, since it uses as much as digits as its factorization.

1102121689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 31.

The square root of 1102121689 is about 33198.2181600158. The cubic root of 1102121689 is about 1032.9433793136.

The spelling of 1102121689 in words is "one billion, one hundred two million, one hundred twenty-one thousand, six hundred eighty-nine".