12120111122010 has 64 divisors (see below), whose sum is σ = 29118807244800. Its totient is φ = 3228637027392.

The previous prime is 12120111121997. The next prime is 12120111122017. The reversal of 12120111122010 is 1022111102121.

It is a happy number.

It is a super-4 number, since 4×12120111122010⁴ (a number of 53 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (12120111122017) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 313656271 + ... + 313694909.

It is an arithmetic number, because the mean of its divisors is an integer number (454981363200).

Almost surely, 2^{12120111122010} is an apocalyptic number.

12120111122010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12120111122010 is an abundant number, since it is smaller than the sum of its proper divisors (16998696122790).

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

12120111122010 is a wasteful number, since it uses less digits than its factorization.

12120111122010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49355.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12120111122010 its reverse (1022111102121), we get a palindrome (13142222224131).

The spelling of 12120111122010 in words is "twelve trillion, one hundred twenty billion, one hundred eleven million, one hundred twenty-two thousand, ten".