10121020201221 has 8 divisors (see below), whose sum is σ = 13494766125984. Its totient is φ = 6747310538640.

The previous prime is 10121020201219. The next prime is 10121020201223. The reversal of 10121020201221 is 12210202012101.

It is an interprime number because it is at equal distance from previous prime (10121020201219) and next prime (10121020201223).

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

It is not a de Polignac number, because 10121020201221 - 2¹ = 10121020201219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10121020201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121020201223) 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, 8407471 + ... + 9535596.

It is an arithmetic number, because the mean of its divisors is an integer number (1686845765748).

Almost surely, 2^{10121020201221} is an apocalyptic number.

It is an amenable number.

10121020201221 is a deficient number, since it is larger than the sum of its proper divisors (3373745924763).

10121020201221 is a wasteful number, since it uses less digits than its factorization.

10121020201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18131091.

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

Adding to 10121020201221 its reverse (12210202012101), we get a palindrome (22331222213322).

The spelling of 10121020201221 in words is "ten trillion, one hundred twenty-one billion, twenty million, two hundred one thousand, two hundred twenty-one".