10010010001221 has 12 divisors (see below), whose sum is σ = 14458930761600. Its totient is φ = 6673327342440.

The previous prime is 10010010001207. The next prime is 10010010001301. The reversal of 10010010001221 is 12210001001001.

It is a happy number.

It is not a de Polignac number, because 10010010001221 - 2⁶ = 10010010001157 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10010010071221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8750380 + ... + 9827978.

It is an arithmetic number, because the mean of its divisors is an integer number (1204910896800).

Almost surely, 2^{10010010001221} is an apocalyptic number.

It is an amenable number.

10010010001221 is a deficient number, since it is larger than the sum of its proper divisors (4448920760379).

10010010001221 is a wasteful number, since it uses less digits than its factorization.

10010010001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2109736 (or 2109733 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10010010001221 its reverse (12210001001001), we get a palindrome (22220011002222).

The spelling of 10010010001221 in words is "ten trillion, ten billion, ten million, one thousand, two hundred twenty-one".