11221022000 has 80 divisors (see below), whose sum is σ = 27763630752. Its totient is φ = 4383993600.

The previous prime is 11221021991. The next prime is 11221022051. The reversal of 11221022000 is 22012211.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×11221022000² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20762 + ... + 151238.

Almost surely, 2^11221022000 is an apocalyptic number.

11221022000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11221022000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13881815376).

11221022000 is an abundant number, since it is smaller than the sum of its proper divisors (16542608752).

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

11221022000 is a wasteful number, since it uses less digits than its factorization.

11221022000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130543 (or 130527 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 11221022000 its reverse (22012211), we get a palindrome (11243034211).

The spelling of 11221022000 in words is "eleven billion, two hundred twenty-one million, twenty-two thousand".