2227144340821 has 2 divisors, whose sum is σ = 2227144340822. Its totient is φ = 2227144340820.

The previous prime is 2227144340797. The next prime is 2227144340833. The reversal of 2227144340821 is 1280434417222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2176099975921 + 51044364900 = 1475161^2 + 225930^2 .

It is a cyclic number.

It is not a de Polignac number, because 2227144340821 - 2¹⁷ = 2227144209749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2227144346821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1113572170410 + 1113572170411.

It is an arithmetic number, because the mean of its divisors is an integer number (1113572170411).

Almost surely, 2^{2227144340821} is an apocalyptic number.

It is an amenable number.

2227144340821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2227144340821 is an equidigital number, since it uses as much as digits as its factorization.

2227144340821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172032, while the sum is 40.

The spelling of 2227144340821 in words is "two trillion, two hundred twenty-seven billion, one hundred forty-four million, three hundred forty thousand, eight hundred twenty-one".