2011531115245 has 32 divisors (see below), whose sum is σ = 2525542351200. Its totient is φ = 1536025903104.

The previous prime is 2011531115239. The next prime is 2011531115263. The reversal of 2011531115245 is 5425111351102.

It can be written as a sum of positive squares in 16 ways, for example, as 477903985636 + 1533627129609 = 691306^2 + 1238397^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011531115245 - 2¹⁷ = 2011530984173 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132565479 + ... + 132580651.

It is an arithmetic number, because the mean of its divisors is an integer number (78923198475).

Almost surely, 2^{2011531115245} is an apocalyptic number.

It is an amenable number.

2011531115245 is a deficient number, since it is larger than the sum of its proper divisors (514011235955).

2011531115245 is a wasteful number, since it uses less digits than its factorization.

2011531115245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25569.

The product of its (nonzero) digits is 6000, while the sum is 31.

Adding to 2011531115245 its reverse (5425111351102), we get a palindrome (7436642466347).

The spelling of 2011531115245 in words is "two trillion, eleven billion, five hundred thirty-one million, one hundred fifteen thousand, two hundred forty-five".