1001111222000 has 40 divisors (see below), whose sum is σ = 2420686939632. Its totient is φ = 400444488000.

The previous prime is 1001111221963. The next prime is 1001111222011. The reversal of 1001111222000 is 2221111001.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250275806 + ... + 250279805.

Almost surely, 2^{1001111222000} is an apocalyptic number.

1001111222000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001111222000 is an abundant number, since it is smaller than the sum of its proper divisors (1419575717632).

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

1001111222000 is an equidigital number, since it uses as much as digits as its factorization.

1001111222000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500555634 (or 500555618 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1001111222000 its reverse (2221111001), we get a palindrome (1003332333001).

The spelling of 1001111222000 in words is "one trillion, one billion, one hundred eleven million, two hundred twenty-two thousand".