221632042051 has 16 divisors (see below), whose sum is σ = 262843776000. Its totient is φ = 186750468744.

The previous prime is 221632042033. The next prime is 221632042063. The reversal of 221632042051 is 150240236122.

It is not a de Polignac number, because 221632042051 - 2¹³ = 221632033859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221632052051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5455675 + ... + 5496148.

It is an arithmetic number, because the mean of its divisors is an integer number (16427736000).

Almost surely, 2^221632042051 is an apocalyptic number.

221632042051 is a deficient number, since it is larger than the sum of its proper divisors (41211733949).

221632042051 is an equidigital number, since it uses as much as digits as its factorization.

221632042051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10951903 (or 10951889 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 221632042051 its reverse (150240236122), we get a palindrome (371872278173).

The spelling of 221632042051 in words is "two hundred twenty-one billion, six hundred thirty-two million, forty-two thousand, fifty-one".