221430627653321 has 4 divisors (see below), whose sum is σ = 221430768387012. Its totient is φ = 221430486919632.

The previous prime is 221430627653311. The next prime is 221430627653351. The reversal of 221430627653321 is 123356726034122.

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 53470608769600 + 167960018883721 = 7312360^2 + 12959939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221430627653321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221430627653311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67979750 + ... + 71162543.

It is an arithmetic number, because the mean of its divisors is an integer number (55357692096753).

Almost surely, 2^{221430627653321} is an apocalyptic number.

It is an amenable number.

221430627653321 is a deficient number, since it is larger than the sum of its proper divisors (140733691).

221430627653321 is a wasteful number, since it uses less digits than its factorization.

221430627653321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140733690.

The product of its (nonzero) digits is 2177280, while the sum is 47.

The spelling of 221430627653321 in words is "two hundred twenty-one trillion, four hundred thirty billion, six hundred twenty-seven million, six hundred fifty-three thousand, three hundred twenty-one".