221386407111 has 24 divisors (see below), whose sum is σ = 324695689344. Its totient is φ = 145324262160.

The previous prime is 221386407107. The next prime is 221386407119. The reversal of 221386407111 is 111704683122.

221386407111 is a `hidden beast` number, since 2 + 2 + 1 + 3 + 8 + 640 + 7 + 1 + 1 + 1 = 666.

It is not a de Polignac number, because 221386407111 - 2² = 221386407107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221386407119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1314100 + ... + 1472966.

It is an arithmetic number, because the mean of its divisors is an integer number (13528987056).

Almost surely, 2^221386407111 is an apocalyptic number.

221386407111 is a deficient number, since it is larger than the sum of its proper divisors (103309282233).

221386407111 is a wasteful number, since it uses less digits than its factorization.

221386407111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161251 (or 161248 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 221386407111 in words is "two hundred twenty-one billion, three hundred eighty-six million, four hundred seven thousand, one hundred eleven".