1163930221 has 4 divisors (see below), whose sum is σ = 1164722944. Its totient is φ = 1163137500.

The previous prime is 1163930213. The next prime is 1163930233. The reversal of 1163930221 is 1220393611.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1220393611 = 811 ⋅1504801.

It is a cyclic number.

It is not a de Polignac number, because 1163930221 - 2³ = 1163930213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1163930221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1163937221) 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 in 3 ways as a sum of consecutive naturals, for example, 394155 + ... + 397096.

It is an arithmetic number, because the mean of its divisors is an integer number (291180736).

Almost surely, 2^1163930221 is an apocalyptic number.

It is an amenable number.

1163930221 is a deficient number, since it is larger than the sum of its proper divisors (792723).

1163930221 is an equidigital number, since it uses as much as digits as its factorization.

1163930221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792722.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1163930221 is about 34116.4215737817. The cubic root of 1163930221 is about 1051.9028897937.

The spelling of 1163930221 in words is "one billion, one hundred sixty-three million, nine hundred thirty thousand, two hundred twenty-one".