1212513116 has 24 divisors (see below), whose sum is σ = 2149615104. Its totient is φ = 598376880.

The previous prime is 1212513091. The next prime is 1212513119. The reversal of 1212513116 is 6113152121.

It is a junction number, because it is equal to n+sod(n) for n = 1212513091 and 1212513100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212513119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123401 + ... + 132863.

It is an arithmetic number, because the mean of its divisors is an integer number (89567296).

Almost surely, 2^1212513116 is an apocalyptic number.

It is an amenable number.

1212513116 is a deficient number, since it is larger than the sum of its proper divisors (937101988).

1212513116 is a wasteful number, since it uses less digits than its factorization.

1212513116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9881 (or 9879 counting only the distinct ones).

The product of its digits is 360, while the sum is 23.

The square root of 1212513116 is about 34821.1590272352. The cubic root of 1212513116 is about 1066.3394627035.

Adding to 1212513116 its reverse (6113152121), we get a palindrome (7325665237).

The spelling of 1212513116 in words is "one billion, two hundred twelve million, five hundred thirteen thousand, one hundred sixteen".