221054530312 has 64 divisors (see below), whose sum is σ = 516815740800. Its totient is φ = 86114327040.

The previous prime is 221054530303. The next prime is 221054530357. The reversal of 221054530312 is 213035450122.

221054530312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6347764 + ... + 6382492.

It is an arithmetic number, because the mean of its divisors is an integer number (8075245950).

Almost surely, 2^221054530312 is an apocalyptic number.

221054530312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221054530312 is an abundant number, since it is smaller than the sum of its proper divisors (295761210488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221054530312 is a wasteful number, since it uses less digits than its factorization.

221054530312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45086 (or 45082 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 221054530312 its reverse (213035450122), we get a palindrome (434089980434).

The spelling of 221054530312 in words is "two hundred twenty-one billion, fifty-four million, five hundred thirty thousand, three hundred twelve".