1078123221 has 24 divisors (see below), whose sum is σ = 1884452544. Its totient is φ = 579830400.

The previous prime is 1078123199. The next prime is 1078123237. The reversal of 1078123221 is 1223218701.

It is not a de Polignac number, because 1078123221 - 2¹¹ = 1078121173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1078123021) 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 23 ways as a sum of consecutive naturals, for example, 502255 + ... + 504396.

It is an arithmetic number, because the mean of its divisors is an integer number (78518856).

Almost surely, 2^1078123221 is an apocalyptic number.

It is an amenable number.

1078123221 is a deficient number, since it is larger than the sum of its proper divisors (806329323).

1078123221 is a wasteful number, since it uses less digits than its factorization.

1078123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006681 (or 1006678 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 1078123221 is about 32834.7867512490. The cubic root of 1078123221 is about 1025.3909184302.

The spelling of 1078123221 in words is "one billion, seventy-eight million, one hundred twenty-three thousand, two hundred twenty-one".