1223391012 has 24 divisors (see below), whose sum is σ = 2915316096. Its totient is φ = 399120288.

The previous prime is 1223391007. The next prime is 1223391031. The reversal of 1223391012 is 2101933221.

1223391012 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1084003 + ... + 1085130.

It is an arithmetic number, because the mean of its divisors is an integer number (121471504).

Almost surely, 2^1223391012 is an apocalyptic number.

1223391012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1223391012 is an abundant number, since it is smaller than the sum of its proper divisors (1691925084).

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

1223391012 is a wasteful number, since it uses less digits than its factorization.

1223391012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169187 (or 2169185 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 1223391012 is about 34977.0069045366. The cubic root of 1223391012 is about 1069.5188135403.

The spelling of 1223391012 in words is "one billion, two hundred twenty-three million, three hundred ninety-one thousand, twelve".