1001011111222 has 16 divisors (see below), whose sum is σ = 1519646374512. Its totient is φ = 494462630560.

The previous prime is 1001011111171. The next prime is 1001011111223. The reversal of 1001011111222 is 2221111101001.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001011111223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12602472 + ... + 12681652.

It is an arithmetic number, because the mean of its divisors is an integer number (94977898407).

Almost surely, 2^{1001011111222} is an apocalyptic number.

1001011111222 is a deficient number, since it is larger than the sum of its proper divisors (518635263290).

1001011111222 is an equidigital number, since it uses as much as digits as its factorization.

1001011111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155423.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1001011111222 its reverse (2221111101001), we get a palindrome (3222122212223).

The spelling of 1001011111222 in words is "one trillion, one billion, eleven million, one hundred eleven thousand, two hundred twenty-two".