20022201112212 has 120 divisors (see below), whose sum is σ = 56393121573096. Its totient is φ = 6157963948032.

The previous prime is 20022201112211. The next prime is 20022201112213. The reversal of 20022201112212 is 21221110222002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20022201112211) and next prime (20022201112213).

It can be written as a sum of positive squares in 4 ways, for example, as 8224253897616 + 11797947214596 = 2867796^2 + 3434814^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022201112211) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8528208 + ... + 10619544.

Almost surely, 2^{20022201112212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20022201112212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28196560786548).

20022201112212 is an abundant number, since it is smaller than the sum of its proper divisors (36370920460884).

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

20022201112212 is a wasteful number, since it uses less digits than its factorization.

20022201112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093639 (or 2093628 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20022201112212 its reverse (21221110222002), we get a palindrome (41243311334214).

The spelling of 20022201112212 in words is "twenty trillion, twenty-two billion, two hundred one million, one hundred twelve thousand, two hundred twelve".