1012320221 has 8 divisors (see below), whose sum is σ = 1139973888. Its totient is φ = 890604000.

The previous prime is 1012320191. The next prime is 1012320251. The reversal of 1012320221 is 1220232101.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1012320191) and next prime (1012320251).

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

It is not a de Polignac number, because 1012320221 - 2¹⁴ = 1012303837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012320196 and 1012320205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012320251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1484000 + ... + 1484681.

It is an arithmetic number, because the mean of its divisors is an integer number (142496736).

Almost surely, 2^1012320221 is an apocalyptic number.

1012320221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012320221 is a deficient number, since it is larger than the sum of its proper divisors (127653667).

1012320221 is a wasteful number, since it uses less digits than its factorization.

1012320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2968723.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1012320221 is about 31816.9800735393. The cubic root of 1012320221 is about 1004.0899895133.

Adding to 1012320221 its reverse (1220232101), we get a palindrome (2232552322).

The spelling of 1012320221 in words is "one billion, twelve million, three hundred twenty thousand, two hundred twenty-one".