20001222210212 has 24 divisors (see below), whose sum is σ = 35577023784120. Its totient is φ = 9836368220160.

The previous prime is 20001222210199. The next prime is 20001222210223. The reversal of 20001222210212 is 21201222210002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1268114723236 + 18733107486976 = 1126106^2 + 4328176^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6924998 + ... + 9378594.

It is an arithmetic number, because the mean of its divisors is an integer number (1482375991005).

Almost surely, 2^{20001222210212} is an apocalyptic number.

It is an amenable number.

20001222210212 is a deficient number, since it is larger than the sum of its proper divisors (15575801573908).

20001222210212 is a wasteful number, since it uses less digits than its factorization.

20001222210212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487071 (or 2487069 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20001222210212 its reverse (21201222210002), we get a palindrome (41202444420214).

The spelling of 20001222210212 in words is "twenty trillion, one billion, two hundred twenty-two million, two hundred ten thousand, two hundred twelve".