22211212021020 has 192 divisors, whose sum is σ = 75388236295680. Its totient is φ = 5384198476800.

The previous prime is 22211212020983. The next prime is 22211212021147. The reversal of 22211212021020 is 2012021211222.

It is a happy number.

22211212021020 is a `hidden beast` number, since 2 + 221 + 1 + 212 + 0 + 210 + 20 = 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 = 22211212020984 and 22211212021002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 102077140 + ... + 102294500.

It is an arithmetic number, because the mean of its divisors is an integer number (392647064040).

Almost surely, 2^{22211212021020} is an apocalyptic number.

22211212021020 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 22211212021020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37694118147840).

22211212021020 is an abundant number, since it is smaller than the sum of its proper divisors (53177024274660).

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

22211212021020 is a wasteful number, since it uses less digits than its factorization.

22211212021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234593 (or 234585 counting only the distinct ones).

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

Adding to 22211212021020 its reverse (2012021211222), we get a palindrome (24223233232242).

The spelling of 22211212021020 in words is "twenty-two trillion, two hundred eleven billion, two hundred twelve million, twenty-one thousand, twenty".