2201555235221 has 2 divisors, whose sum is σ = 2201555235222. Its totient is φ = 2201555235220.

The previous prime is 2201555235167. The next prime is 2201555235263. The reversal of 2201555235221 is 1225325551022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1678087068100 + 523468167121 = 1295410^2 + 723511^2 .

It is a cyclic number.

It is not a de Polignac number, because 2201555235221 - 2⁶ = 2201555235157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2201555235421) 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, 1100777617610 + 1100777617611.

It is an arithmetic number, because the mean of its divisors is an integer number (1100777617611).

Almost surely, 2^{2201555235221} is an apocalyptic number.

It is an amenable number.

2201555235221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2201555235221 is an equidigital number, since it uses as much as digits as its factorization.

2201555235221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 2201555235221 in words is "two trillion, two hundred one billion, five hundred fifty-five million, two hundred thirty-five thousand, two hundred twenty-one".