1211516038 has 16 divisors (see below), whose sum is σ = 1914127920. Its totient is φ = 573513696.

The previous prime is 1211516017. The next prime is 1211516041. The reversal of 1211516038 is 8306151121.

It is a super-2 number, since 2×1211516038² = 2935542220662434888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211515997 and 1211516015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56656 + ... + 75052.

It is an arithmetic number, because the mean of its divisors is an integer number (119632995).

Almost surely, 2^1211516038 is an apocalyptic number.

1211516038 is a deficient number, since it is larger than the sum of its proper divisors (702611882).

1211516038 is a wasteful number, since it uses less digits than its factorization.

1211516038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20151.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1211516038 is about 34806.8389544354. The cubic root of 1211516038 is about 1066.0470905562.

Adding to 1211516038 its reverse (8306151121), we get a palindrome (9517667159).

The spelling of 1211516038 in words is "one billion, two hundred eleven million, five hundred sixteen thousand, thirty-eight".