201105287138 has 16 divisors (see below), whose sum is σ = 344758762944. Its totient is φ = 86186269680.

The previous prime is 201105287129. The next prime is 201105287167. The reversal of 201105287138 is 831782501102.

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, 805481 + ... + 1025187.

It is an arithmetic number, because the mean of its divisors is an integer number (21547422684).

Almost surely, 2^201105287138 is an apocalyptic number.

201105287138 is a deficient number, since it is larger than the sum of its proper divisors (143653475806).

201105287138 is a wasteful number, since it uses less digits than its factorization.

201105287138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285097.

The product of its (nonzero) digits is 26880, while the sum is 38.

The spelling of 201105287138 in words is "two hundred one billion, one hundred five million, two hundred eighty-seven thousand, one hundred thirty-eight".