1211213876 has 24 divisors (see below), whose sum is σ = 2205584640. Its totient is φ = 581533472.

The previous prime is 1211213867. The next prime is 1211213903. The reversal of 1211213876 is 6783121121.

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, 50816 + ... + 70743.

It is an arithmetic number, because the mean of its divisors is an integer number (91899360).

Almost surely, 2^1211213876 is an apocalyptic number.

It is an amenable number.

1211213876 is a deficient number, since it is larger than the sum of its proper divisors (994370764).

1211213876 is a wasteful number, since it uses less digits than its factorization.

1211213876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121663 (or 121661 counting only the distinct ones).

The product of its digits is 4032, while the sum is 32.

The square root of 1211213876 is about 34802.4981287263. The cubic root of 1211213876 is about 1065.9584562352.

Adding to 1211213876 its reverse (6783121121), we get a palindrome (7994334997).

The spelling of 1211213876 in words is "one billion, two hundred eleven million, two hundred thirteen thousand, eight hundred seventy-six".