2555335106221 has 2 divisors, whose sum is σ = 2555335106222. Its totient is φ = 2555335106220.

The previous prime is 2555335106197. The next prime is 2555335106273. The reversal of 2555335106221 is 1226015335552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2387735752900 + 167599353321 = 1545230^2 + 409389^2 .

It is a cyclic number.

It is not a de Polignac number, because 2555335106221 - 2¹¹ = 2555335104173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2555335100221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277667553110 + 1277667553111.

It is an arithmetic number, because the mean of its divisors is an integer number (1277667553111).

Almost surely, 2^{2555335106221} is an apocalyptic number.

It is an amenable number.

2555335106221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2555335106221 is an equidigital number, since it uses as much as digits as its factorization.

2555335106221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270000, while the sum is 40.

The spelling of 2555335106221 in words is "two trillion, five hundred fifty-five billion, three hundred thirty-five million, one hundred six thousand, two hundred twenty-one".