12101111023212 has 24 divisors (see below), whose sum is σ = 31373250801200. Its totient is φ = 4033703674368.

The previous prime is 12101111023207. The next prime is 12101111023229. The reversal of 12101111023212 is 21232011110121.

It is a happy number.

It is a super-2 number, since 2×12101111023212² (a number of 27 digits) contains 22 as substring.

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

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, 56023662037 + ... + 56023662252.

Almost surely, 2^{12101111023212} is an apocalyptic number.

12101111023212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12101111023212 is an abundant number, since it is smaller than the sum of its proper divisors (19272139777988).

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

12101111023212 is a wasteful number, since it uses less digits than its factorization.

12101111023212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112047324302 (or 112047324294 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 12101111023212 its reverse (21232011110121), we get a palindrome (33333122133333).

The spelling of 12101111023212 in words is "twelve trillion, one hundred one billion, one hundred eleven million, twenty-three thousand, two hundred twelve".