201387138012 has 108 divisors (see below), whose sum is σ = 549634996456. Its totient is φ = 62144340480.

The previous prime is 201387137999. The next prime is 201387138023. The reversal of 201387138012 is 210831783102.

201387138012 is a `hidden beast` number, since 201 + 3 + 8 + 71 + 380 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 475983 + ... + 793305.

Almost surely, 2^201387138012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201387138012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274817498228).

201387138012 is an abundant number, since it is smaller than the sum of its proper divisors (348247858444).

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

201387138012 is a wasteful number, since it uses less digits than its factorization.

201387138012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317428 (or 317406 counting only the distinct ones).

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

The spelling of 201387138012 in words is "two hundred one billion, three hundred eighty-seven million, one hundred thirty-eight thousand, twelve".