2221001111100 has 72 divisors (see below), whose sum is σ = 6705492071040. Its totient is φ = 566516223680.

The previous prime is 2221001111081. The next prime is 2221001111129. The reversal of 2221001111100 is 11111001222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160935210 + ... + 160949009.

It is an arithmetic number, because the mean of its divisors is an integer number (93131834320).

Almost surely, 2^{2221001111100} is an apocalyptic number.

2221001111100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221001111100 is an abundant number, since it is smaller than the sum of its proper divisors (4484490959940).

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

2221001111100 is a wasteful number, since it uses less digits than its factorization.

2221001111100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321884259 (or 321884252 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2221001111100 its reverse (11111001222), we get a palindrome (2232112112322).

It can be divided in two parts, 22210011 and 11100, that added together give a triangular number (22221111 = T₆₆₆₆).

The spelling of 2221001111100 in words is "two trillion, two hundred twenty-one billion, one million, one hundred eleven thousand, one hundred".