1128938101 has 4 divisors (see below), whose sum is σ = 1129089472. Its totient is φ = 1128786732.

The previous prime is 1128938093. The next prime is 1128938113. The reversal of 1128938101 is 1018398211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1128938101 - 2³ = 1128938093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128938201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63885 + ... + 79618.

It is an arithmetic number, because the mean of its divisors is an integer number (282272368).

Almost surely, 2^1128938101 is an apocalyptic number.

It is an amenable number.

1128938101 is a deficient number, since it is larger than the sum of its proper divisors (151371).

1128938101 is an equidigital number, since it uses as much as digits as its factorization.

1128938101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151370.

The product of its (nonzero) digits is 3456, while the sum is 34.

The square root of 1128938101 is about 33599.6741204435. The cubic root of 1128938101 is about 1041.2540656632.

The spelling of 1128938101 in words is "one billion, one hundred twenty-eight million, nine hundred thirty-eight thousand, one hundred one".