221331221296 has 40 divisors (see below), whose sum is σ = 447226070144. Its totient is φ = 105991649280.

The previous prime is 221331221281. The next prime is 221331221299. The reversal of 221331221296 is 692122133122.

It is not an unprimeable number, because it can be changed into a prime (221331221299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2252055 + ... + 2348278.

Almost surely, 2^221331221296 is an apocalyptic number.

It is an amenable number.

221331221296 is an abundant number, since it is smaller than the sum of its proper divisors (225894848848).

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

221331221296 is a wasteful number, since it uses less digits than its factorization.

221331221296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4600469 (or 4600463 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The spelling of 221331221296 in words is "two hundred twenty-one billion, three hundred thirty-one million, two hundred twenty-one thousand, two hundred ninety-six".