201601500111 has 24 divisors (see below), whose sum is σ = 334394835840. Its totient is φ = 115752056400.

The previous prime is 201601500109. The next prime is 201601500137. The reversal of 201601500111 is 111005106102.

It is a happy number.

201601500111 is a `hidden beast` number, since 2 + 0 + 1 + 601 + 50 + 0 + 1 + 11 = 666.

It is not a de Polignac number, because 201601500111 - 2¹ = 201601500109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201601500101) 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, 53587035 + ... + 53590796.

It is an arithmetic number, because the mean of its divisors is an integer number (13933118160).

Almost surely, 2^201601500111 is an apocalyptic number.

201601500111 is a deficient number, since it is larger than the sum of its proper divisors (132793335729).

201601500111 is a wasteful number, since it uses less digits than its factorization.

201601500111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107177867 (or 107177864 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 18.

Adding to 201601500111 its reverse (111005106102), we get a palindrome (312606606213).

The spelling of 201601500111 in words is "two hundred one billion, six hundred one million, five hundred thousand, one hundred eleven".