20012121222212 has 18 divisors (see below), whose sum is σ = 40738961059902. Its totient is φ = 8576623380864.

The previous prime is 20012121222199. The next prime is 20012121222239. The reversal of 20012121222212 is 21222212121002.

It can be written as a sum of positive squares in only one way, i.e., 10942242104836 + 9069879117376 = 3307906^2 + 3011624^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51051329453 + ... + 51051329844.

It is an arithmetic number, because the mean of its divisors is an integer number (2263275614439).

Almost surely, 2^{20012121222212} is an apocalyptic number.

It is an amenable number.

20012121222212 is an abundant number, since it is smaller than the sum of its proper divisors (20726839837690).

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

20012121222212 is a wasteful number, since it uses less digits than its factorization.

20012121222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102102659315 (or 102102659306 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 20012121222212 its reverse (21222212121002), we get a palindrome (41234333343214).

The spelling of 20012121222212 in words is "twenty trillion, twelve billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twelve".