2227144380821 has 4 divisors (see below), whose sum is σ = 2230321477644. Its totient is φ = 2223967284000.

The previous prime is 2227144380787. The next prime is 2227144380887. The reversal of 2227144380821 is 1280834417222.

It is a happy number.

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 1396913611921 + 830230768900 = 1181911^2 + 911170^2 .

It is a cyclic number.

It is not a de Polignac number, because 2227144380821 - 2²² = 2227140186517 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 (2227144340821) 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, 1588547360 + ... + 1588548761.

It is an arithmetic number, because the mean of its divisors is an integer number (557580369411).

Almost surely, 2^{2227144380821} is an apocalyptic number.

It is an amenable number.

2227144380821 is a deficient number, since it is larger than the sum of its proper divisors (3177096823).

2227144380821 is an equidigital number, since it uses as much as digits as its factorization.

2227144380821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3177096822.

The product of its (nonzero) digits is 344064, while the sum is 44.

The spelling of 2227144380821 in words is "two trillion, two hundred twenty-seven billion, one hundred forty-four million, three hundred eighty thousand, eight hundred twenty-one".