221354450124 has 12 divisors (see below), whose sum is σ = 516493716984. Its totient is φ = 73784816704.

The previous prime is 221354450111. The next prime is 221354450131. The reversal of 221354450124 is 421054453122.

It is a tau number, because it is divible by the number of its divisors (12).

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, 9223102077 + ... + 9223102100.

It is an arithmetic number, because the mean of its divisors is an integer number (43041143082).

Almost surely, 2^221354450124 is an apocalyptic number.

It is an amenable number.

221354450124 is an abundant number, since it is smaller than the sum of its proper divisors (295139266860).

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

221354450124 is a wasteful number, since it uses less digits than its factorization.

221354450124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18446204184 (or 18446204182 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

The spelling of 221354450124 in words is "two hundred twenty-one billion, three hundred fifty-four million, four hundred fifty thousand, one hundred twenty-four".