221216506968 has 32 divisors (see below), whose sum is σ = 585573107760. Its totient is φ = 69401256960.

The previous prime is 221216506859. The next prime is 221216506997. The reversal of 221216506968 is 869605612122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271098253 + ... + 271099068.

Almost surely, 2^221216506968 is an apocalyptic number.

It is an amenable number.

221216506968 is an abundant number, since it is smaller than the sum of its proper divisors (364356600792).

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

221216506968 is a wasteful number, since it uses less digits than its factorization.

221216506968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542197347 (or 542197343 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 221216506968 in words is "two hundred twenty-one billion, two hundred sixteen million, five hundred six thousand, nine hundred sixty-eight".