12031220131212 has 48 divisors (see below), whose sum is σ = 29294611379712. Its totient is φ = 3835883293440.

The previous prime is 12031220131201. The next prime is 12031220131219. The reversal of 12031220131212 is 21213102213021.

It is not an unprimeable number, because it can be changed into a prime (12031220131219) 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, 5913268 + ... + 7683044.

It is an arithmetic number, because the mean of its divisors is an integer number (610304403744).

Almost surely, 2^{12031220131212} is an apocalyptic number.

12031220131212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12031220131212 is an abundant number, since it is smaller than the sum of its proper divisors (17263391248500).

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

12031220131212 is a wasteful number, since it uses less digits than its factorization.

12031220131212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1794438 (or 1794436 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 12031220131212 its reverse (21213102213021), we get a palindrome (33244322344233).

The spelling of 12031220131212 in words is "twelve trillion, thirty-one billion, two hundred twenty million, one hundred thirty-one thousand, two hundred twelve".