20210010121221 has 8 divisors (see below), whose sum is σ = 28118274951360. Its totient is φ = 12887542685952.

The previous prime is 20210010121177. The next prime is 20210010121229. The reversal of 20210010121221 is 12212101001202.

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

It is not a de Polignac number, because 20210010121221 - 2³⁰ = 20208936379397 is a prime.

It is a super-2 number, since 2×20210010121221² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20210010121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210010121229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146449348636 + ... + 146449348773.

It is an arithmetic number, because the mean of its divisors is an integer number (3514784368920).

Almost surely, 2^{20210010121221} is an apocalyptic number.

It is an amenable number.

20210010121221 is a deficient number, since it is larger than the sum of its proper divisors (7908264830139).

20210010121221 is a wasteful number, since it uses less digits than its factorization.

20210010121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292898697435.

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

Adding to 20210010121221 its reverse (12212101001202), we get a palindrome (32422111122423).

The spelling of 20210010121221 in words is "twenty trillion, two hundred ten billion, ten million, one hundred twenty-one thousand, two hundred twenty-one".