10011001021221 has 8 divisors (see below), whose sum is σ = 14133177912384. Its totient is φ = 6281412405440.

The previous prime is 10011001021181. The next prime is 10011001021223. The reversal of 10011001021221 is 12212010011001.

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

It is a cyclic number.

It is not a de Polignac number, because 10011001021221 - 2¹⁰ = 10011001020197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10011001021197 and 10011001021206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10011001021223) 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, 98147068785 + ... + 98147068886.

It is an arithmetic number, because the mean of its divisors is an integer number (1766647239048).

Almost surely, 2^{10011001021221} is an apocalyptic number.

It is an amenable number.

10011001021221 is a deficient number, since it is larger than the sum of its proper divisors (4122176891163).

10011001021221 is a wasteful number, since it uses less digits than its factorization.

10011001021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196294137691.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 10011001021221 its reverse (12212010011001), we get a palindrome (22223011032222).

The spelling of 10011001021221 in words is "ten trillion, eleven billion, one million, twenty-one thousand, two hundred twenty-one".