1220022221020 has 24 divisors (see below), whose sum is σ = 2566486977264. Its totient is φ = 487163114496.

The previous prime is 1220022221003. The next prime is 1220022221023. The reversal of 1220022221020 is 201222200221.

It is a junction number, because it is equal to n+sod(n) for n = 1220022220985 and 1220022221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220022221023) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 52849042 + ... + 52872121.

It is an arithmetic number, because the mean of its divisors is an integer number (106936957386).

Almost surely, 2^{1220022221020} is an apocalyptic number.

1220022221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220022221020 is an abundant number, since it is smaller than the sum of its proper divisors (1346464756244).

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

1220022221020 is a wasteful number, since it uses less digits than its factorization.

1220022221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105721749 (or 105721747 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 1220022221020 its reverse (201222200221), we get a palindrome (1421244421241).

The spelling of 1220022221020 in words is "one trillion, two hundred twenty billion, twenty-two million, two hundred twenty-one thousand, twenty".