20022211121220 has 672 divisors, whose sum is σ = 78866272961280. Its totient is φ = 4146191815680.

The previous prime is 20022211121219. The next prime is 20022211121287. The reversal of 20022211121220 is 2212111222002.

It is a happy number.

20022211121220 is a `hidden beast` number, since 200 + 2 + 221 + 1 + 1 + 21 + 220 = 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 = 20022211121193 and 20022211121202.

It is an unprimeable number.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 328908946 + ... + 328969814.

It is an arithmetic number, because the mean of its divisors is an integer number (117360525240).

Almost surely, 2^{20022211121220} is an apocalyptic number.

20022211121220 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 20022211121220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39433136480640).

20022211121220 is an abundant number, since it is smaller than the sum of its proper divisors (58844061840060).

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

20022211121220 is a wasteful number, since it uses less digits than its factorization.

20022211121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61207 (or 61190 counting only the distinct ones).

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

Adding to 20022211121220 its reverse (2212111222002), we get a palindrome (22234322343222).

The spelling of 20022211121220 in words is "twenty trillion, twenty-two billion, two hundred eleven million, one hundred twenty-one thousand, two hundred twenty".