1220020100220 has 24 divisors (see below), whose sum is σ = 3416056280784. Its totient is φ = 325338693376.

The previous prime is 1220020100149. The next prime is 1220020100261. The reversal of 1220020100220 is 220010200221.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1220020100196 and 1220020100205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10166834109 + ... + 10166834228.

It is an arithmetic number, because the mean of its divisors is an integer number (142335678366).

Almost surely, 2^{1220020100220} is an apocalyptic number.

1220020100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220020100220 is an abundant number, since it is smaller than the sum of its proper divisors (2196036180564).

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

1220020100220 is a wasteful number, since it uses less digits than its factorization.

1220020100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20333668349 (or 20333668347 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 1220020100220 its reverse (220010200221), we get a palindrome (1440030300441).

The spelling of 1220020100220 in words is "one trillion, two hundred twenty billion, twenty million, one hundred thousand, two hundred twenty".