1212167378 has 16 divisors (see below), whose sum is σ = 1864646784. Its totient is φ = 590651040.

The previous prime is 1212167279. The next prime is 1212167393. The reversal of 1212167378 is 8737612121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71651 + ... + 86937.

It is an arithmetic number, because the mean of its divisors is an integer number (116540424).

Almost surely, 2^1212167378 is an apocalyptic number.

1212167378 is a deficient number, since it is larger than the sum of its proper divisors (652479406).

1212167378 is a wasteful number, since it uses less digits than its factorization.

1212167378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16297.

The product of its digits is 28224, while the sum is 38.

The square root of 1212167378 is about 34816.1941917838. The cubic root of 1212167378 is about 1066.2381004679.

Adding to 1212167378 its reverse (8737612121), we get a palindrome (9949779499).

The spelling of 1212167378 in words is "one billion, two hundred twelve million, one hundred sixty-seven thousand, three hundred seventy-eight".