20121120001212 has 48 divisors (see below), whose sum is σ = 49063275351552. Its totient is φ = 6411678013440.

The previous prime is 20121120001211. The next prime is 20121120001243. The reversal of 20121120001212 is 21210002112102.

It is a junction number, because it is equal to n+sod(n) for n = 20121120001191 and 20121120001200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121120001211) 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, 414809989 + ... + 414858492.

It is an arithmetic number, because the mean of its divisors is an integer number (1022151569824).

Almost surely, 2^{20121120001212} is an apocalyptic number.

It is an amenable number.

20121120001212 is an abundant number, since it is smaller than the sum of its proper divisors (28942155350340).

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

20121120001212 is a wasteful number, since it uses less digits than its factorization.

20121120001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829668578 (or 829668576 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20121120001212 its reverse (21210002112102), we get a palindrome (41331122113314).

The spelling of 20121120001212 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty million, one thousand, two hundred twelve".