1220420550220 has 24 divisors (see below), whose sum is σ = 2576162350944. Its totient is φ = 485638849536.

The previous prime is 1220420550197. The next prime is 1220420550247. The reversal of 1220420550220 is 220550240221.

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, 158081704 + ... + 158089423.

It is an arithmetic number, because the mean of its divisors is an integer number (107340097956).

Almost surely, 2^{1220420550220} is an apocalyptic number.

1220420550220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220420550220 is an abundant number, since it is smaller than the sum of its proper divisors (1355741800724).

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

1220420550220 is a wasteful number, since it uses less digits than its factorization.

1220420550220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316171329 (or 316171327 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 1220420550220 its reverse (220550240221), we get a palindrome (1440970790441).

The spelling of 1220420550220 in words is "one trillion, two hundred twenty billion, four hundred twenty million, five hundred fifty thousand, two hundred twenty".