221541348723 has 4 divisors (see below), whose sum is σ = 295388464968. Its totient is φ = 147694232480.

The previous prime is 221541348709. The next prime is 221541348733. The reversal of 221541348723 is 327843145122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221541348723 - 2¹² = 221541344627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221541348733) 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, 36923558118 + ... + 36923558123.

It is an arithmetic number, because the mean of its divisors is an integer number (73847116242).

Almost surely, 2^221541348723 is an apocalyptic number.

221541348723 is a deficient number, since it is larger than the sum of its proper divisors (73847116245).

221541348723 is an equidigital number, since it uses as much as digits as its factorization.

221541348723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73847116244.

The product of its digits is 322560, while the sum is 42.

The spelling of 221541348723 in words is "two hundred twenty-one billion, five hundred forty-one million, three hundred forty-eight thousand, seven hundred twenty-three".