1211200008 has 64 divisors (see below), whose sum is σ = 3130859520. Its totient is φ = 390062400.

The previous prime is 1211199971. The next prime is 1211200009. The reversal of 1211200008 is 8000021121.

It is a self number, because there is not a number n which added to its sum of digits gives 1211200008.

It is not an unprimeable number, because it can be changed into a prime (1211200009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 676891 + ... + 678677.

It is an arithmetic number, because the mean of its divisors is an integer number (48919680).

Almost surely, 2^1211200008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211200008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1565429760).

1211200008 is an abundant number, since it is smaller than the sum of its proper divisors (1919659512).

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

1211200008 is a wasteful number, since it uses less digits than its factorization.

1211200008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2738 (or 2734 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1211200008 is about 34802.2988895849. The cubic root of 1211200008 is about 1065.9543879285.

Adding to 1211200008 its reverse (8000021121), we get a palindrome (9211221129).

The spelling of 1211200008 in words is "one billion, two hundred eleven million, two hundred thousand, eight".