20021202021222 has 16 divisors (see below), whose sum is σ = 44491560047280. Its totient is φ = 6673734007056.

The previous prime is 20021202021199. The next prime is 20021202021229. The reversal of 20021202021222 is 22212020212002.

20021202021222 is a `hidden beast` number, since 200 + 21 + 20 + 202 + 1 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20021202021195 and 20021202021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021202021229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185381500143 + ... + 185381500250.

It is an arithmetic number, because the mean of its divisors is an integer number (2780722502955).

Almost surely, 2^{20021202021222} is an apocalyptic number.

20021202021222 is an abundant number, since it is smaller than the sum of its proper divisors (24470358026058).

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

20021202021222 is a wasteful number, since it uses less digits than its factorization.

20021202021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370763000404 (or 370763000398 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20021202021222 its reverse (22212020212002), we get a palindrome (42233222233224).

The spelling of 20021202021222 in words is "twenty trillion, twenty-one billion, two hundred two million, twenty-one thousand, two hundred twenty-two".