1211242516 has 12 divisors (see below), whose sum is σ = 2312372160. Its totient is φ = 550564760.

The previous prime is 1211242481. The next prime is 1211242519. The reversal of 1211242516 is 6152421121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211242519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13764076 + ... + 13764163.

It is an arithmetic number, because the mean of its divisors is an integer number (192697680).

Almost surely, 2^1211242516 is an apocalyptic number.

It is an amenable number.

1211242516 is a deficient number, since it is larger than the sum of its proper divisors (1101129644).

1211242516 is a wasteful number, since it uses less digits than its factorization.

1211242516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27528254 (or 27528252 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 1211242516 is about 34802.9095910098. The cubic root of 1211242516 is about 1065.9668579469.

Adding to 1211242516 its reverse (6152421121), we get a palindrome (7363663637).

The spelling of 1211242516 in words is "one billion, two hundred eleven million, two hundred forty-two thousand, five hundred sixteen".