12011211212 has 96 divisors (see below), whose sum is σ = 29882442240. Its totient is φ = 4065592320.

The previous prime is 12011211187. The next prime is 12011211221. The reversal of 12011211212 is 21211211021.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20162 + ... + 156297.

It is an arithmetic number, because the mean of its divisors is an integer number (311275440).

Almost surely, 2^12011211212 is an apocalyptic number.

It is an amenable number.

12011211212 is an abundant number, since it is smaller than the sum of its proper divisors (17871231028).

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

12011211212 is a wasteful number, since it uses less digits than its factorization.

12011211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176511 (or 176509 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12011211212 its reverse (21211211021), we get a palindrome (33222422233).

The spelling of 12011211212 in words is "twelve billion, eleven million, two hundred eleven thousand, two hundred twelve".