1215500205111 has 16 divisors (see below), whose sum is σ = 1635098197344. Its totient is φ = 803143845504.

The previous prime is 1215500205109. The next prime is 1215500205119. The reversal of 1215500205111 is 1115020055121.

It is not a de Polignac number, because 1215500205111 - 2¹ = 1215500205109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215500205119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3063240 + ... + 3437213.

It is an arithmetic number, because the mean of its divisors is an integer number (102193637334).

Almost surely, 2^{1215500205111} is an apocalyptic number.

1215500205111 is a deficient number, since it is larger than the sum of its proper divisors (419597992233).

1215500205111 is a wasteful number, since it uses less digits than its factorization.

1215500205111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6501010.

The product of its (nonzero) digits is 500, while the sum is 24.

The spelling of 1215500205111 in words is "one trillion, two hundred fifteen billion, five hundred million, two hundred five thousand, one hundred eleven".