10212101011221 has 16 divisors (see below), whose sum is σ = 13987698129600. Its totient is φ = 6622379296128.

The previous prime is 10212101011201. The next prime is 10212101011253. The reversal of 10212101011221 is 12211010121201.

It is a happy number.

It is not a de Polignac number, because 10212101011221 - 2¹⁰ = 10212101010197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10212101011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212101011201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11271811 + ... + 12144048.

It is an arithmetic number, because the mean of its divisors is an integer number (874231133100).

Almost surely, 2^{10212101011221} is an apocalyptic number.

It is an amenable number.

10212101011221 is a deficient number, since it is larger than the sum of its proper divisors (3775597118379).

10212101011221 is a wasteful number, since it uses less digits than its factorization.

10212101011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23419828.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 10212101011221 its reverse (12211010121201), we get a palindrome (22423111132422).

The spelling of 10212101011221 in words is "ten trillion, two hundred twelve billion, one hundred one million, eleven thousand, two hundred twenty-one".