2021101012221 has 8 divisors (see below), whose sum is σ = 2714471433024. Its totient is φ = 1337565633120.

The previous prime is 2021101012163. The next prime is 2021101012223. The reversal of 2021101012221 is 1222101011202.

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

It is not a de Polignac number, because 2021101012221 - 2¹⁹ = 2021100487933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2021101012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021101012223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2458759945 + ... + 2458760766.

It is an arithmetic number, because the mean of its divisors is an integer number (339308929128).

Almost surely, 2^{2021101012221} is an apocalyptic number.

It is an amenable number.

2021101012221 is a deficient number, since it is larger than the sum of its proper divisors (693370420803).

2021101012221 is a wasteful number, since it uses less digits than its factorization.

2021101012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4917520851.

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

Adding to 2021101012221 its reverse (1222101011202), we get a palindrome (3243202023423).

The spelling of 2021101012221 in words is "two trillion, twenty-one billion, one hundred one million, twelve thousand, two hundred twenty-one".