1023221312 has 28 divisors (see below), whose sum is σ = 2049444720. Its totient is φ = 506825856.

The previous prime is 1023221291. The next prime is 1023221327. The reversal of 1023221312 is 2131223201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67862 + ... + 81557.

Almost surely, 2^1023221312 is an apocalyptic number.

It is an amenable number.

1023221312 is an abundant number, since it is smaller than the sum of its proper divisors (1026223408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1023221312 is a wasteful number, since it uses less digits than its factorization.

1023221312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149538 (or 149528 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1023221312 is about 31987.8306860593. The cubic root of 1023221312 is about 1007.6812841366.

Adding to 1023221312 its reverse (2131223201), we get a palindrome (3154444513).

The spelling of 1023221312 in words is "one billion, twenty-three million, two hundred twenty-one thousand, three hundred twelve".