10221221001012 has 192 divisors, whose sum is σ = 27670404335616. Its totient is φ = 2876356707840.

The previous prime is 10221221000989. The next prime is 10221221001071. The reversal of 10221221001012 is 21010012212201.

It is a junction number, because it is equal to n+sod(n) for n = 10221221000982 and 10221221001000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2345928738 + ... + 2345933094.

It is an arithmetic number, because the mean of its divisors is an integer number (144116689248).

Almost surely, 2^{10221221001012} is an apocalyptic number.

10221221001012 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 10221221001012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13835202167808).

10221221001012 is an abundant number, since it is smaller than the sum of its proper divisors (17449183334604).

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

10221221001012 is a wasteful number, since it uses less digits than its factorization.

10221221001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5926 (or 5924 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 10221221001012 its reverse (21010012212201), we get a palindrome (31231233213213).

The spelling of 10221221001012 in words is "ten trillion, two hundred twenty-one billion, two hundred twenty-one million, one thousand, twelve".