2211331120021 has 4 divisors (see below), whose sum is σ = 2222788794412. Its totient is φ = 2199873445632.

The previous prime is 2211331119997. The next prime is 2211331120067. The reversal of 2211331120021 is 1200211331122.

2211331120021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 612484672996 + 1598846447025 = 782614^2 + 1264455^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211331120021 - 2¹⁷ = 2211330988949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211331120091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5728836906 + ... + 5728837291.

It is an arithmetic number, because the mean of its divisors is an integer number (555697198603).

Almost surely, 2^{2211331120021} is an apocalyptic number.

It is an amenable number.

2211331120021 is a deficient number, since it is larger than the sum of its proper divisors (11457674391).

2211331120021 is a wasteful number, since it uses less digits than its factorization.

2211331120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11457674390.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 2211331120021 its reverse (1200211331122), we get a palindrome (3411542451143).

The spelling of 2211331120021 in words is "two trillion, two hundred eleven billion, three hundred thirty-one million, one hundred twenty thousand, twenty-one".