221534462021441 has 4 divisors (see below), whose sum is σ = 231166395152832. Its totient is φ = 211902528890052.

The previous prime is 221534462021399. The next prime is 221534462021449. The reversal of 221534462021441 is 144120264435122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221534462021441 - 2³⁸ = 221259584114497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221534462021449) 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, 4815966565661 + ... + 4815966565706.

It is an arithmetic number, because the mean of its divisors is an integer number (57791598788208).

Almost surely, 2^{221534462021441} is an apocalyptic number.

It is an amenable number.

221534462021441 is a deficient number, since it is larger than the sum of its proper divisors (9631933131391).

221534462021441 is an equidigital number, since it uses as much as digits as its factorization.

221534462021441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9631933131390.

The product of its (nonzero) digits is 368640, while the sum is 41.

The spelling of 221534462021441 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred sixty-two million, twenty-one thousand, four hundred forty-one".