11001000221000 has 32 divisors (see below), whose sum is σ = 25742340519480. Its totient is φ = 4400400088000.

The previous prime is 11001000220993. The next prime is 11001000221021. The reversal of 11001000221000 is 12200010011.

It can be written as a sum of positive squares in 4 ways, for example, as 4203164226244 + 6797835994756 = 2050162^2 + 2607266^2 .

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

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, 5500499111 + ... + 5500501110.

Almost surely, 2^{11001000221000} is an apocalyptic number.

11001000221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11001000221000 is an abundant number, since it is smaller than the sum of its proper divisors (14741340298480).

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

11001000221000 is a wasteful number, since it uses less digits than its factorization.

11001000221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11001000242 (or 11001000228 counting only the distinct ones).

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

Adding to 11001000221000 its reverse (12200010011), we get a palindrome (11013200231011).

The spelling of 11001000221000 in words is "eleven trillion, one billion, two hundred twenty-one thousand".