12021011121012 has 48 divisors (see below), whose sum is σ = 29703857218560. Its totient is φ = 3770676836352.

The previous prime is 12021011121001. The next prime is 12021011121013. The reversal of 12021011121012 is 21012111012021.

It is a happy number.

12021011121012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12021011120982 and 12021011121000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021011121013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3606613 + ... + 6086844.

It is an arithmetic number, because the mean of its divisors is an integer number (618830358720).

Almost surely, 2^{12021011121012} is an apocalyptic number.

12021011121012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12021011121012 is an abundant number, since it is smaller than the sum of its proper divisors (17682846097548).

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

12021011121012 is a wasteful number, since it uses less digits than its factorization.

12021011121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9699560 (or 9699558 counting only the distinct ones).

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

Adding to 12021011121012 its reverse (21012111012021), we get a palindrome (33033122133033).

The spelling of 12021011121012 in words is "twelve trillion, twenty-one billion, eleven million, one hundred twenty-one thousand, twelve".