221051055205351 has 12 divisors (see below), whose sum is σ = 257206637563680. Its totient is φ = 189423985756320.

The previous prime is 221051055205349. The next prime is 221051055205373. The reversal of 221051055205351 is 153502550150122.

It is not a de Polignac number, because 221051055205351 - 2¹ = 221051055205349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221051055205351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221051055203351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 575368830 + ... + 575752891.

It is an arithmetic number, because the mean of its divisors is an integer number (21433886463640).

Almost surely, 2^{221051055205351} is an apocalyptic number.

221051055205351 is a deficient number, since it is larger than the sum of its proper divisors (36155582358329).

221051055205351 is a wasteful number, since it uses less digits than its factorization.

221051055205351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151125654 (or 1151125647 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 37.

The spelling of 221051055205351 in words is "two hundred twenty-one trillion, fifty-one billion, fifty-five million, two hundred five thousand, three hundred fifty-one".