11121221421200 has 60 divisors (see below), whose sum is σ = 29147710336368. Its totient is φ = 4044080515200.

The previous prime is 11121221421173. The next prime is 11121221421229. The reversal of 11121221421200 is 212412212111.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1263770762 + ... + 1263779561.

Almost surely, 2^{11121221421200} is an apocalyptic number.

11121221421200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11121221421200 is an abundant number, since it is smaller than the sum of its proper divisors (18026488915168).

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

11121221421200 is a wasteful number, since it uses less digits than its factorization.

11121221421200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2527550352 (or 2527550341 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 11121221421200 its reverse (212412212111), we get a palindrome (11333633633311).

The spelling of 11121221421200 in words is "eleven trillion, one hundred twenty-one billion, two hundred twenty-one million, four hundred twenty-one thousand, two hundred".