11212120008 has 32 divisors (see below), whose sum is σ = 31144778400. Its totient is φ = 3737373264.

The previous prime is 11212119979. The next prime is 11212120033. The reversal of 11212120008 is 80002121211.

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

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, 25953766 + ... + 25954197.

It is an arithmetic number, because the mean of its divisors is an integer number (973274325).

Almost surely, 2^11212120008 is an apocalyptic number.

11212120008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11212120008 is an abundant number, since it is smaller than the sum of its proper divisors (19932658392).

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

11212120008 is a wasteful number, since it uses less digits than its factorization.

11212120008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51907978 (or 51907968 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11212120008 its reverse (80002121211), we get a palindrome (91214241219).

The spelling of 11212120008 in words is "eleven billion, two hundred twelve million, one hundred twenty thousand, eight".