221551055104 has 36 divisors (see below), whose sum is σ = 444528157276. Its totient is φ = 110201536512.

The previous prime is 221551055071. The next prime is 221551055123. The reversal of 221551055104 is 401550155122.

It can be written as a sum of positive squares in 2 ways, for example, as 141376000000 + 80175055104 = 376000^2 + 283152^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2192649 + ... + 2291464.

Almost surely, 2^221551055104 is an apocalyptic number.

It is an amenable number.

221551055104 is an abundant number, since it is smaller than the sum of its proper divisors (222977102172).

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

221551055104 is an equidigital number, since it uses as much as digits as its factorization.

221551055104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4484322 (or 4484308 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 31.

The spelling of 221551055104 in words is "two hundred twenty-one billion, five hundred fifty-one million, fifty-five thousand, one hundred four".