1011100221222 has 128 divisors (see below), whose sum is σ = 2558574412800. Its totient is φ = 259208418816.

The previous prime is 1011100221203. The next prime is 1011100221233. The reversal of 1011100221222 is 2221220011101.

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 63 ways as a sum of consecutive naturals, for example, 21572529 + ... + 21619347.

It is an arithmetic number, because the mean of its divisors is an integer number (19988862600).

Almost surely, 2^{1011100221222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1011100221222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1279287206400).

1011100221222 is an abundant number, since it is smaller than the sum of its proper divisors (1547474191578).

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

1011100221222 is a wasteful number, since it uses less digits than its factorization.

1011100221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47950.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1011100221222 its reverse (2221220011101), we get a palindrome (3232320232323).

The spelling of 1011100221222 in words is "one trillion, eleven billion, one hundred million, two hundred twenty-one thousand, two hundred twenty-two".