1220211012220 has 72 divisors (see below), whose sum is σ = 2645525235024. Its totient is φ = 472648611072.

The previous prime is 1220211012217. The next prime is 1220211012233. The reversal of 1220211012220 is 222101120221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1220211012194 and 1220211012203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4533744 + ... + 4795336.

It is an arithmetic number, because the mean of its divisors is an integer number (36743406042).

Almost surely, 2^{1220211012220} is an apocalyptic number.

1220211012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220211012220 is an abundant number, since it is smaller than the sum of its proper divisors (1425314222804).

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

1220211012220 is a wasteful number, since it uses less digits than its factorization.

1220211012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261787 (or 261726 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1220211012220 its reverse (222101120221), we get a palindrome (1442312132441).

The spelling of 1220211012220 in words is "one trillion, two hundred twenty billion, two hundred eleven million, twelve thousand, two hundred twenty".