201240101505 has 32 divisors (see below), whose sum is σ = 334224092160. Its totient is φ = 103273345280.

The previous prime is 201240101431. The next prime is 201240101507. The reversal of 201240101505 is 505101042102.

It is not a de Polignac number, because 201240101505 - 2⁹ = 201240100993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201240101507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 662001 + ... + 916910.

It is an arithmetic number, because the mean of its divisors is an integer number (10444502880).

Almost surely, 2^201240101505 is an apocalyptic number.

It is an amenable number.

201240101505 is a deficient number, since it is larger than the sum of its proper divisors (132983990655).

201240101505 is a wasteful number, since it uses less digits than its factorization.

201240101505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579241.

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 201240101505 its reverse (505101042102), we get a palindrome (706341143607).

The spelling of 201240101505 in words is "two hundred one billion, two hundred forty million, one hundred one thousand, five hundred five".