1288122113 has 8 divisors (see below), whose sum is σ = 1364212008. Its totient is φ = 1212067584.

The previous prime is 1288122109. The next prime is 1288122131. The reversal of 1288122113 is 3112218821.

It can be written as a sum of positive squares in 4 ways, for example, as 122036209 + 1166085904 = 11047^2 + 34148^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1288122113 - 2² = 1288122109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1288122103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119495 + ... + 129827.

It is an arithmetic number, because the mean of its divisors is an integer number (170526501).

Almost surely, 2^1288122113 is an apocalyptic number.

It is an amenable number.

1288122113 is a deficient number, since it is larger than the sum of its proper divisors (76089895).

1288122113 is a wasteful number, since it uses less digits than its factorization.

1288122113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17683.

The product of its digits is 1536, while the sum is 29.

The square root of 1288122113 is about 35890.4181223903. The cubic root of 1288122113 is about 1088.0587485511.

The spelling of 1288122113 in words is "one billion, two hundred eighty-eight million, one hundred twenty-two thousand, one hundred thirteen".