12021111222012 has 48 divisors (see below), whose sum is σ = 31176363079680. Its totient is φ = 4005684609264.

The previous prime is 12021111221971. The next prime is 12021111222013. The reversal of 12021111222012 is 21022211112021.

12021111222012 is a `hidden beast` number, since 120 + 211 + 112 + 220 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021111222013) 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, 18462748 + ... + 19102755.

It is an arithmetic number, because the mean of its divisors is an integer number (649507564160).

Almost surely, 2^{12021111222012} is an apocalyptic number.

12021111222012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12021111222012 is an abundant number, since it is smaller than the sum of its proper divisors (19155251857668).

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

12021111222012 is a wasteful number, since it uses less digits than its factorization.

12021111222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37568479 (or 37568471 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12021111222012 its reverse (21022211112021), we get a palindrome (33043322334033).

The spelling of 12021111222012 in words is "twelve trillion, twenty-one billion, one hundred eleven million, two hundred twenty-two thousand, twelve".