221877340851241 has 4 divisors (see below), whose sum is σ = 221877492985300. Its totient is φ = 221877188717184.

The previous prime is 221877340851113. The next prime is 221877340851269. The reversal of 221877340851241 is 142158043778122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68417646078016 + 153459694773225 = 8271496^2 + 12387885^2 .

It is a cyclic number.

It is not a de Polignac number, because 221877340851241 - 2⁷ = 221877340851113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221877340801241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73857996 + ... + 76803373.

It is an arithmetic number, because the mean of its divisors is an integer number (55469373246325).

Almost surely, 2^{221877340851241} is an apocalyptic number.

It is an amenable number.

221877340851241 is a deficient number, since it is larger than the sum of its proper divisors (152134059).

221877340851241 is a wasteful number, since it uses less digits than its factorization.

221877340851241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152134058.

The product of its (nonzero) digits is 6021120, while the sum is 55.

The spelling of 221877340851241 in words is "two hundred twenty-one trillion, eight hundred seventy-seven billion, three hundred forty million, eight hundred fifty-one thousand, two hundred forty-one".