20121121121212 has 12 divisors (see below), whose sum is σ = 35228439263920. Its totient is φ = 10055852760096.

The previous prime is 20121121121203. The next prime is 20121121121221. The reversal of 20121121121212 is 21212112112102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20121121121203) and next prime (20121121121221).

It is a self number, because there is not a number n which added to its sum of digits gives 20121121121212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1176940512 + ... + 1176957607.

Almost surely, 2^{20121121121212} is an apocalyptic number.

It is an amenable number.

20121121121212 is a deficient number, since it is larger than the sum of its proper divisors (15107318142708).

20121121121212 is a wasteful number, since it uses less digits than its factorization.

20121121121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2353900260 (or 2353900258 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 20121121121212 its reverse (21212112112102), we get a palindrome (41333233233314).

The spelling of 20121121121212 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred twelve".