12001211000 has 32 divisors (see below), whose sum is σ = 28082836080. Its totient is φ = 4800484000.

The previous prime is 12001210999. The next prime is 12001211021. The reversal of 12001211000 is 11210021.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5999606 + ... + 6001605.

Almost surely, 2^12001211000 is an apocalyptic number.

12001211000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001211000 is an abundant number, since it is smaller than the sum of its proper divisors (16081625080).

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

12001211000 is a wasteful number, since it uses less digits than its factorization.

12001211000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12001232 (or 12001218 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 12001211000 its reverse (11210021), we get a palindrome (12012421021).

The spelling of 12001211000 in words is "twelve billion, one million, two hundred eleven thousand".