1220022212220 has 576 divisors, whose sum is σ = 4695299481600. Its totient is φ = 259699426560.

The previous prime is 1220022212119. The next prime is 1220022212231. The reversal of 1220022212220 is 222122200221.

1220022212220 is a `hidden beast` number, since 1 + 220 + 0 + 2 + 221 + 2 + 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 = 1220022212193 and 1220022212202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 38120425 + ... + 38152415.

It is an arithmetic number, because the mean of its divisors is an integer number (8151561600).

Almost surely, 2^{1220022212220} is an apocalyptic number.

1220022212220 is a gapful number since it is divisible by the number (10) 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 1220022212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2347649740800).

1220022212220 is an abundant number, since it is smaller than the sum of its proper divisors (3475277269380).

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

1220022212220 is a wasteful number, since it uses less digits than its factorization.

1220022212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32100 (or 32086 counting only the distinct ones).

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

Adding to 1220022212220 its reverse (222122200221), we get a palindrome (1442144412441).

The spelling of 1220022212220 in words is "one trillion, two hundred twenty billion, twenty-two million, two hundred twelve thousand, two hundred twenty".