1000221110000 has 100 divisors (see below), whose sum is σ = 2767583427312. Its totient is φ = 342932928000.

The previous prime is 1000221109963. The next prime is 1000221110003. The reversal of 1000221110000 is 111220001.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1000221110000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000221110003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7074437 + ... + 7214436.

Almost surely, 2^{1000221110000} is an apocalyptic number.

1000221110000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000221110000 is an abundant number, since it is smaller than the sum of its proper divisors (1767362317312).

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

1000221110000 is an equidigital number, since it uses as much as digits as its factorization.

1000221110000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14288908 (or 14288887 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1000221110000 its reverse (111220001), we get a palindrome (1000332330001).

The spelling of 1000221110000 in words is "one trillion, two hundred twenty-one million, one hundred ten thousand".