221461012216 has 8 divisors (see below), whose sum is σ = 415239397920. Its totient is φ = 110730506104.

The previous prime is 221461012207. The next prime is 221461012219. The reversal of 221461012216 is 612210164122.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221461012219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13841313256 + ... + 13841313271.

It is an arithmetic number, because the mean of its divisors is an integer number (51904924740).

Almost surely, 2^221461012216 is an apocalyptic number.

It is an amenable number.

221461012216 is a deficient number, since it is larger than the sum of its proper divisors (193778385704).

221461012216 is a wasteful number, since it uses less digits than its factorization.

221461012216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27682626533 (or 27682626529 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 221461012216 its reverse (612210164122), we get a palindrome (833671176338).

The spelling of 221461012216 in words is "two hundred twenty-one billion, four hundred sixty-one million, twelve thousand, two hundred sixteen".