221431350274061 has 8 divisors (see below), whose sum is σ = 234627486206904. Its totient is φ = 208254187939840.

The previous prime is 221431350273937. The next prime is 221431350274067. The reversal of 221431350274061 is 160472053134122.

It can be written as a sum of positive squares in 4 ways, for example, as 50990753289961 + 170440596984100 = 7140781^2 + 13055290^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221431350274061 - 2¹⁰ = 221431350273037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221431350274067) 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 in 7 ways as a sum of consecutive naturals, for example, 4743375620 + ... + 4743422301.

It is an arithmetic number, because the mean of its divisors is an integer number (29328435775863).

Almost surely, 2^{221431350274061} is an apocalyptic number.

It is an amenable number.

221431350274061 is a deficient number, since it is larger than the sum of its proper divisors (13196135932843).

221431350274061 is a wasteful number, since it uses less digits than its factorization.

221431350274061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9486799311.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 221431350274061 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, three hundred fifty million, two hundred seventy-four thousand, sixty-one".