1212122000 has 80 divisors (see below), whose sum is σ = 2941371264. Its totient is φ = 483120000.

The previous prime is 1212121997. The next prime is 1212122039. The reversal of 1212122000 is 2212121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 661085 + ... + 662915.

Almost surely, 2^1212122000 is an apocalyptic number.

1212122000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212122000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1470685632).

1212122000 is an abundant number, since it is smaller than the sum of its proper divisors (1729249264).

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

1212122000 is a wasteful number, since it uses less digits than its factorization.

1212122000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185 (or 2169 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1212122000 is about 34815.5425061854. The cubic root of 1212122000 is about 1066.2247952767.

Adding to 1212122000 its reverse (2212121), we get a palindrome (1214334121).

The spelling of 1212122000 in words is "one billion, two hundred twelve million, one hundred twenty-two thousand".