1220100210220 has 96 divisors (see below), whose sum is σ = 2621817253440. Its totient is φ = 476798530560.

The previous prime is 1220100210187. The next prime is 1220100210223. The reversal of 1220100210220 is 220120010221.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220100210220.

It is not an unprimeable number, because it can be changed into a prime (1220100210223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128956290 + ... + 128965750.

It is an arithmetic number, because the mean of its divisors is an integer number (27310596390).

Almost surely, 2^{1220100210220} is an apocalyptic number.

1220100210220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220100210220 is an abundant number, since it is smaller than the sum of its proper divisors (1401717043220).

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

1220100210220 is a wasteful number, since it uses less digits than its factorization.

1220100210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10195 (or 10193 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1220100210220 its reverse (220120010221), we get a palindrome (1440220220441).

The spelling of 1220100210220 in words is "one trillion, two hundred twenty billion, one hundred million, two hundred ten thousand, two hundred twenty".