1200505101 has 16 divisors (see below), whose sum is σ = 1739274240. Its totient is φ = 733754160.

The previous prime is 1200505087. The next prime is 1200505121. The reversal of 1200505101 is 1015050021.

It is not a de Polignac number, because 1200505101 - 2¹³ = 1200496909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200505121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337935 + ... + 341468.

It is an arithmetic number, because the mean of its divisors is an integer number (108704640).

Almost surely, 2^1200505101 is an apocalyptic number.

It is an amenable number.

1200505101 is a deficient number, since it is larger than the sum of its proper divisors (538769139).

1200505101 is a wasteful number, since it uses less digits than its factorization.

1200505101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679456.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 1200505101 is about 34648.3058893216. The cubic root of 1200505101 is about 1062.8076454644.

Adding to 1200505101 its reverse (1015050021), we get a palindrome (2215555122).

The spelling of 1200505101 in words is "one billion, two hundred million, five hundred five thousand, one hundred one".