11203231221000 has 1152 divisors, whose sum is σ = 48129735513600. Its totient is φ = 2299792435200.

The previous prime is 11203231220971. The next prime is 11203231221011. The reversal of 11203231221000 is 12213230211.

11203231221000 is a `hidden beast` number, since 1 + 120 + 323 + 1 + 221 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 393924781 + ... + 393953219.

It is an arithmetic number, because the mean of its divisors is an integer number (41779284300).

Almost surely, 2^{11203231221000} is an apocalyptic number.

11203231221000 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 11203231221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24064867756800).

11203231221000 is an abundant number, since it is smaller than the sum of its proper divisors (36926504292600).

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

11203231221000 is a wasteful number, since it uses less digits than its factorization.

11203231221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28536 (or 28506 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 11203231221000 its reverse (12213230211), we get a palindrome (11215444451211).

The spelling of 11203231221000 in words is "eleven trillion, two hundred three billion, two hundred thirty-one million, two hundred twenty-one thousand".