1012320421 has 8 divisors (see below), whose sum is σ = 1168865600. Its totient is φ = 858757248.

The previous prime is 1012320349. The next prime is 1012320431. The reversal of 1012320421 is 1240232101.

1012320421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012320421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012320395 and 1012320404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012320431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 744771 + ... + 746128.

It is an arithmetic number, because the mean of its divisors is an integer number (146108200).

Almost surely, 2^1012320421 is an apocalyptic number.

It is an amenable number.

1012320421 is a deficient number, since it is larger than the sum of its proper divisors (156545179).

1012320421 is an equidigital number, since it uses as much as digits as its factorization.

1012320421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491003.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1012320421 is about 31816.9832165150. The cubic root of 1012320421 is about 1004.0900556380.

Adding to 1012320421 its reverse (1240232101), we get a palindrome (2252552522).

The spelling of 1012320421 in words is "one billion, twelve million, three hundred twenty thousand, four hundred twenty-one".