10221012 has 96 divisors (see below), whose sum is σ = 29635200. Its totient is φ = 3027456.

The previous prime is 10221007. The next prime is 10221037. The reversal of 10221012 is 21012201.

It is a super-3 number, since 3×10221012³ (a number of 22 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 10220985 and 10221003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34738 + ... + 35030.

It is an arithmetic number, because the mean of its divisors is an integer number (308700).

Almost surely, 2^10221012 is an apocalyptic number.

10221012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10221012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14817600).

10221012 is an abundant number, since it is smaller than the sum of its proper divisors (19414188).

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

10221012 is a wasteful number, since it uses less digits than its factorization.

10221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 10221012 is about 3197.0317483566. The cubic root of 10221012 is about 217.0191039833.

Adding to 10221012 its reverse (21012201), we get a palindrome (31233213).

The spelling of 10221012 in words is "ten million, two hundred twenty-one thousand, twelve".