12111212021202 has 48 divisors (see below), whose sum is σ = 30146681889792. Its totient is φ = 3442229288640.

The previous prime is 12111212021173. The next prime is 12111212021287. The reversal of 12111212021202 is 20212021211121.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 251600883 + ... + 251649014.

It is an arithmetic number, because the mean of its divisors is an integer number (628055872704).

Almost surely, 2^{12111212021202} is an apocalyptic number.

12111212021202 is an abundant number, since it is smaller than the sum of its proper divisors (18035469868590).

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

12111212021202 is a wasteful number, since it uses less digits than its factorization.

12111212021202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503250103 (or 503250100 counting only the distinct ones).

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

Adding to 12111212021202 its reverse (20212021211121), we get a palindrome (32323233232323).

It can be divided in two parts, 1211121 and 2021202, that added together give a palindrome (3232323).

The spelling of 12111212021202 in words is "twelve trillion, one hundred eleven billion, two hundred twelve million, twenty-one thousand, two hundred two".