221357405550311 has 2 divisors, whose sum is σ = 221357405550312. Its totient is φ = 221357405550310.

The previous prime is 221357405550301. The next prime is 221357405550313. The reversal of 221357405550311 is 113055504753122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221357405550311 is a prime.

Together with 221357405550313, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221357405550313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110678702775155 + 110678702775156.

It is an arithmetic number, because the mean of its divisors is an integer number (110678702775156).

Almost surely, 2^{221357405550311} is an apocalyptic number.

221357405550311 is a deficient number, since it is larger than the sum of its proper divisors (1).

221357405550311 is an equidigital number, since it uses as much as digits as its factorization.

221357405550311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630000, while the sum is 44.

The spelling of 221357405550311 in words is "two hundred twenty-one trillion, three hundred fifty-seven billion, four hundred five million, five hundred fifty thousand, three hundred eleven".