12011012121220 has 24 divisors (see below), whose sum is σ = 28826429091264. Its totient is φ = 4118061298656.

The previous prime is 12011012121149. The next prime is 12011012121253. The reversal of 12011012121220 is 2212121011021.

It is a junction number, because it is equal to n+sod(n) for n = 12011012121194 and 12011012121203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42896471722 + ... + 42896472001.

It is an arithmetic number, because the mean of its divisors is an integer number (1201101212136).

Almost surely, 2^{12011012121220} is an apocalyptic number.

12011012121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011012121220 is an abundant number, since it is smaller than the sum of its proper divisors (16815416970044).

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

12011012121220 is a wasteful number, since it uses less digits than its factorization.

12011012121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85792943739 (or 85792943737 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12011012121220 its reverse (2212121011021), we get a palindrome (14223133132241).

The spelling of 12011012121220 in words is "twelve trillion, eleven billion, twelve million, one hundred twenty-one thousand, two hundred twenty".