1138750221 has 64 divisors (see below), whose sum is σ = 1866170880. Its totient is φ = 603832320.

The previous prime is 1138750211. The next prime is 1138750271. The reversal of 1138750221 is 1220578311.

It is not a de Polignac number, because 1138750221 - 2⁵ = 1138750189 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138750201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2185441 + ... + 2185961.

It is an arithmetic number, because the mean of its divisors is an integer number (29158920).

Almost surely, 2^1138750221 is an apocalyptic number.

It is an amenable number.

1138750221 is a deficient number, since it is larger than the sum of its proper divisors (727420659).

1138750221 is a wasteful number, since it uses less digits than its factorization.

1138750221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 1138750221 is about 33745.3733273170. The cubic root of 1138750221 is about 1044.2620404387.

The spelling of 1138750221 in words is "one billion, one hundred thirty-eight million, seven hundred fifty thousand, two hundred twenty-one".