12121211120 has 40 divisors (see below), whose sum is σ = 29665073040. Its totient is φ = 4593300480.

The previous prime is 12121211111. The next prime is 12121211131. The reversal of 12121211120 is 2111212121.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×12121211120² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12121211095 and 12121211104.

It is a congruent number.

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, 3985721 + ... + 3988760.

It is an arithmetic number, because the mean of its divisors is an integer number (741626826).

Almost surely, 2^12121211120 is an apocalyptic number.

12121211120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121211120 is an abundant number, since it is smaller than the sum of its proper divisors (17543861920).

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

12121211120 is a wasteful number, since it uses less digits than its factorization.

12121211120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7974513 (or 7974507 counting only the distinct ones).

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

Adding to 12121211120 its reverse (2111212121), we get a palindrome (14232423241).

The spelling of 12121211120 in words is "twelve billion, one hundred twenty-one million, two hundred eleven thousand, one hundred twenty".