221534455627321 has 16 divisors (see below), whose sum is σ = 240142537728000. Its totient is φ = 203593436155648.

The previous prime is 221534455627273. The next prime is 221534455627393. The reversal of 221534455627321 is 123726554435122.

It is not a de Polignac number, because 221534455627321 - 2¹³ = 221534455619129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221534455621321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 741031225 + ... + 741330118.

It is an arithmetic number, because the mean of its divisors is an integer number (15008908608000).

Almost surely, 2^{221534455627321} is an apocalyptic number.

It is an amenable number.

221534455627321 is a deficient number, since it is larger than the sum of its proper divisors (18608082100679).

221534455627321 is a wasteful number, since it uses less digits than its factorization.

221534455627321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482361568.

The product of its digits is 12096000, while the sum is 52.

The spelling of 221534455627321 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred fifty-five million, six hundred twenty-seven thousand, three hundred twenty-one".