221647102372756 has 12 divisors (see below), whose sum is σ = 387888535385568. Its totient is φ = 110821806548312.

The previous prime is 221647102372733. The next prime is 221647102372799. The reversal of 221647102372756 is 657273201746122.

It is a junction number, because it is equal to n+sod(n) for n = 221647102372697 and 221647102372706.

It is a congruent number.

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, 435873646 + ... + 436381861.

It is an arithmetic number, because the mean of its divisors is an integer number (32324044615464).

Almost surely, 2^{221647102372756} is an apocalyptic number.

It is an amenable number.

221647102372756 is a deficient number, since it is larger than the sum of its proper divisors (166241433012812).

221647102372756 is a wasteful number, since it uses less digits than its factorization.

221647102372756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872319038 (or 872319036 counting only the distinct ones).

The product of its (nonzero) digits is 11854080, while the sum is 55.

The spelling of 221647102372756 in words is "two hundred twenty-one trillion, six hundred forty-seven billion, one hundred two million, three hundred seventy-two thousand, seven hundred fifty-six".