1242511011 has 24 divisors (see below), whose sum is σ = 2171785824. Its totient is φ = 668240640.

The previous prime is 1242511009. The next prime is 1242511043. The reversal of 1242511011 is 1101152421.

It is not a de Polignac number, because 1242511011 - 2¹ = 1242511009 is a prime.

It is a super-2 number, since 2×1242511011² = 3087667224912484242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1242511051) 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, 579000 + ... + 581141.

It is an arithmetic number, because the mean of its divisors is an integer number (90491076).

Almost surely, 2^1242511011 is an apocalyptic number.

1242511011 is a deficient number, since it is larger than the sum of its proper divisors (929274813).

1242511011 is a wasteful number, since it uses less digits than its factorization.

1242511011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160171 (or 1160168 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 1242511011 is about 35249.2696520084. The cubic root of 1242511011 is about 1075.0617627395.

Adding to 1242511011 its reverse (1101152421), we get a palindrome (2343663432).

It can be divided in two parts, 12425 and 11011, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 1242511011 in words is "one billion, two hundred forty-two million, five hundred eleven thousand, eleven".