22012212112220 has 96 divisors (see below), whose sum is σ = 50998261789440. Its totient is φ = 7913932336640.

The previous prime is 22012212112211. The next prime is 22012212112223. The reversal of 22012212112220 is 2221121221022.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22012212112192 and 22012212112201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012212112223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 347454587 + ... + 347517933.

It is an arithmetic number, because the mean of its divisors is an integer number (531231893640).

Almost surely, 2^{22012212112220} is an apocalyptic number.

22012212112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22012212112220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25499130894720).

22012212112220 is an abundant number, since it is smaller than the sum of its proper divisors (28986049677220).

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

22012212112220 is a wasteful number, since it uses less digits than its factorization.

22012212112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81203 (or 81201 counting only the distinct ones).

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

Adding to 22012212112220 its reverse (2221121221022), we get a palindrome (24233333333242).

The spelling of 22012212112220 in words is "twenty-two trillion, twelve billion, two hundred twelve million, one hundred twelve thousand, two hundred twenty".