11211021211200 has 168 divisors, whose sum is σ = 37299542408640. Its totient is φ = 2947498444800.

The previous prime is 11211021211121. The next prime is 11211021211211. The reversal of 11211021211200 is 211212011211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11211021211200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16107295 + ... + 16788894.

Almost surely, 2^{11211021211200} is an apocalyptic number.

11211021211200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211021211200 is an abundant number, since it is smaller than the sum of its proper divisors (26088521197440).

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

11211021211200 is a wasteful number, since it uses less digits than its factorization.

11211021211200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32896285 (or 32896270 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11211021211200 its reverse (211212011211), we get a palindrome (11422233222411).

The spelling of 11211021211200 in words is "eleven trillion, two hundred eleven billion, twenty-one million, two hundred eleven thousand, two hundred".