2021111002221 has 8 divisors (see below), whose sum is σ = 2757484778400. Its totient is φ = 1316072280432.

The previous prime is 2021111002217. The next prime is 2021111002283. The reversal of 2021111002221 is 1222001111202.

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

It is not a de Polignac number, because 2021111002221 - 2² = 2021111002217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2021111002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021111002291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7833763446 + ... + 7833763703.

It is an arithmetic number, because the mean of its divisors is an integer number (344685597300).

Almost surely, 2^{2021111002221} is an apocalyptic number.

It is an amenable number.

2021111002221 is a deficient number, since it is larger than the sum of its proper divisors (736373776179).

2021111002221 is a wasteful number, since it uses less digits than its factorization.

2021111002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15667527195.

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

Adding to 2021111002221 its reverse (1222001111202), we get a palindrome (3243112113423).

The spelling of 2021111002221 in words is "two trillion, twenty-one billion, one hundred eleven million, two thousand, two hundred twenty-one".