12021121122 has 24 divisors (see below), whose sum is σ = 24899883216. Its totient is φ = 3868864944.

The previous prime is 12021121109. The next prime is 12021121127. The reversal of 12021121122 is 22112112021.

It is not an unprimeable number, because it can be changed into a prime (12021121127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1186108 + ... + 1196199.

It is an arithmetic number, because the mean of its divisors is an integer number (1037495134).

Almost surely, 2^12021121122 is an apocalyptic number.

12021121122 is an abundant number, since it is smaller than the sum of its proper divisors (12878762094).

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

12021121122 is a wasteful number, since it uses less digits than its factorization.

12021121122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382370 (or 2382341 counting only the distinct ones).

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

Adding to 12021121122 its reverse (22112112021), we get a palindrome (34133233143).

The spelling of 12021121122 in words is "twelve billion, twenty-one million, one hundred twenty-one thousand, one hundred twenty-two".