2221051643453 has 2 divisors, whose sum is σ = 2221051643454. Its totient is φ = 2221051643452.

The previous prime is 2221051643401. The next prime is 2221051643477. The reversal of 2221051643453 is 3543461501222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1738911667684 + 482139975769 = 1318678^2 + 694363^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221051643453 - 2¹⁸ = 2221051381309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221051673453) 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 as a sum of consecutive naturals, namely, 1110525821726 + 1110525821727.

It is an arithmetic number, because the mean of its divisors is an integer number (1110525821727).

Almost surely, 2^{2221051643453} is an apocalyptic number.

It is an amenable number.

2221051643453 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221051643453 is an equidigital number, since it uses as much as digits as its factorization.

2221051643453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 2221051643453 in words is "two trillion, two hundred twenty-one billion, fifty-one million, six hundred forty-three thousand, four hundred fifty-three".