20021222212212 has 48 divisors (see below), whose sum is σ = 50618386629440. Its totient is φ = 6122582339328.

The previous prime is 20021222212207. The next prime is 20021222212213. The reversal of 20021222212212 is 21221222212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021222212213) 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, 393659137 + ... + 393709992.

Almost surely, 2^{20021222212212} is an apocalyptic number.

It is an amenable number.

20021222212212 is an abundant number, since it is smaller than the sum of its proper divisors (30597164417228).

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

20021222212212 is a wasteful number, since it uses less digits than its factorization.

20021222212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787369312 (or 787369310 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 20021222212212 its reverse (21221222212002), we get a palindrome (41242444424214).

The spelling of 20021222212212 in words is "twenty trillion, twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, two hundred twelve".