1212166000 has 40 divisors (see below), whose sum is σ = 2931022224. Its totient is φ = 484865600.

The previous prime is 1212165973. The next prime is 1212166003. The reversal of 1212166000 is 6612121.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212166003) by changing a digit.

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, 301042 + ... + 305041.

Almost surely, 2^1212166000 is an apocalyptic number.

1212166000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212166000 is an abundant number, since it is smaller than the sum of its proper divisors (1718856224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212166000 is an equidigital number, since it uses as much as digits as its factorization.

1212166000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606106 (or 606090 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1212166000 is about 34816.1744021367. The cubic root of 1212166000 is about 1066.2376964322.

Adding to 1212166000 its reverse (6612121), we get a palindrome (1218778121).

The spelling of 1212166000 in words is "one billion, two hundred twelve million, one hundred sixty-six thousand".