2211221300220 has 72 divisors (see below), whose sum is σ = 6721858293696. Its totient is φ = 588385429632.

The previous prime is 2211221300207. The next prime is 2211221300243. The reversal of 2211221300220 is 220031221122.

2211221300220 is a `hidden beast` number, since 2 + 21 + 122 + 1 + 300 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2211221300193 and 2211221300202.

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, 13182927 + ... + 13349606.

It is an arithmetic number, because the mean of its divisors is an integer number (93359142968).

Almost surely, 2^{2211221300220} is an apocalyptic number.

2211221300220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211221300220 is an abundant number, since it is smaller than the sum of its proper divisors (4510636993476).

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

2211221300220 is a wasteful number, since it uses less digits than its factorization.

2211221300220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26533011 (or 26533006 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 2211221300220 its reverse (220031221122), we get a palindrome (2431252521342).

The spelling of 2211221300220 in words is "two trillion, two hundred eleven billion, two hundred twenty-one million, three hundred thousand, two hundred twenty".