2211210221220 has 768 divisors, whose sum is σ = 9350787317760. Its totient is φ = 424119836160.

The previous prime is 2211210221219. The next prime is 2211210221291. The reversal of 2211210221220 is 221220121122.

It is a happy number.

2211210221220 is a `hidden beast` number, since 2 + 2 + 11 + 210 + 221 + 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 = 2211210221193 and 2211210221202.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 43758489 + ... + 43808991.

It is an arithmetic number, because the mean of its divisors is an integer number (12175504320).

Almost surely, 2^{2211210221220} is an apocalyptic number.

2211210221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2211210221220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4675393658880).

2211210221220 is an abundant number, since it is smaller than the sum of its proper divisors (7139577096540).

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

2211210221220 is a wasteful number, since it uses less digits than its factorization.

2211210221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50564 (or 50544 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2211210221220 its reverse (221220121122), we get a palindrome (2432430342342).

The spelling of 2211210221220 in words is "two trillion, two hundred eleven billion, two hundred ten million, two hundred twenty-one thousand, two hundred twenty".