20120120111212 has 48 divisors (see below), whose sum is σ = 38792604291840. Its totient is φ = 9054689336000.

The previous prime is 20120120111207. The next prime is 20120120111249. The reversal of 20120120111212 is 21211102102102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273531423 + ... + 273604969.

It is an arithmetic number, because the mean of its divisors is an integer number (808179256080).

Almost surely, 2^{20120120111212} is an apocalyptic number.

20120120111212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20120120111212 is a deficient number, since it is larger than the sum of its proper divisors (18672484180628).

20120120111212 is a wasteful number, since it uses less digits than its factorization.

20120120111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135222 (or 135220 counting only the distinct ones).

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

Adding to 20120120111212 its reverse (21211102102102), we get a palindrome (41331222213314).

The spelling of 20120120111212 in words is "twenty trillion, one hundred twenty billion, one hundred twenty million, one hundred eleven thousand, two hundred twelve".