221534461474321 has 2 divisors, whose sum is σ = 221534461474322. Its totient is φ = 221534461474320.

The previous prime is 221534461474259. The next prime is 221534461474373. The reversal of 221534461474321 is 123474164435122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213147268990096 + 8387192484225 = 14599564^2 + 2896065^2 .

It is a cyclic number.

It is not a de Polignac number, because 221534461474321 - 2⁴⁵ = 186350089385489 is a prime.

It is a super-2 number, since 2×221534461474321² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221534461474121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110767230737160 + 110767230737161.

It is an arithmetic number, because the mean of its divisors is an integer number (110767230737161).

Almost surely, 2^{221534461474321} is an apocalyptic number.

It is an amenable number.

221534461474321 is a deficient number, since it is larger than the sum of its proper divisors (1).

221534461474321 is an equidigital number, since it uses as much as digits as its factorization.

221534461474321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3870720, while the sum is 49.

The spelling of 221534461474321 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred sixty-one million, four hundred seventy-four thousand, three hundred twenty-one".