2211221376 has 512 divisors, whose sum is σ = 8225280000. Its totient is φ = 569327616.

The previous prime is 2211221339. The next prime is 2211221431. The reversal of 2211221376 is 6731221122.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24845140 + ... + 24845228.

It is an arithmetic number, because the mean of its divisors is an integer number (16065000).

Almost surely, 2^2211221376 is an apocalyptic number.

2211221376 is a gapful number since it is divisible by the number (26) 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 2211221376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4112640000).

2211221376 is an abundant number, since it is smaller than the sum of its proper divisors (6014058624).

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

2211221376 is a wasteful number, since it uses less digits than its factorization.

2211221376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 193 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 2211221376 is about 47023.6257215455. The cubic root of 2211221376 is about 1302.7989744509.

Adding to 2211221376 its reverse (6731221122), we get a palindrome (8942442498).

The spelling of 2211221376 in words is "two billion, two hundred eleven million, two hundred twenty-one thousand, three hundred seventy-six".