1212022008 has 128 divisors (see below), whose sum is σ = 3562272000. Its totient is φ = 380764800.

The previous prime is 1212022003. The next prime is 1212022013. The reversal of 1212022008 is 8002202121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1212022003) and next prime (1212022013).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212022001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 930958 + ... + 932258.

It is an arithmetic number, because the mean of its divisors is an integer number (27830250).

Almost surely, 2^1212022008 is an apocalyptic number.

1212022008 is a gapful number since it is divisible by the number (18) 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 1212022008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1781136000).

1212022008 is an abundant number, since it is smaller than the sum of its proper divisors (2350249992).

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

1212022008 is a wasteful number, since it uses less digits than its factorization.

1212022008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562 (or 1552 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1212022008 is about 34814.1064512648. The cubic root of 1212022008 is about 1066.1954756533.

Adding to 1212022008 its reverse (8002202121), we get a palindrome (9214224129).

The spelling of 1212022008 in words is "one billion, two hundred twelve million, twenty-two thousand, eight".