11421020400000 has 192 divisors, whose sum is σ = 37918933814160. Its totient is φ = 3045605120000.

The previous prime is 11421020399969. The next prime is 11421020400019. The reversal of 11421020400000 is 402012411.

It is a tau number, because it is divible by the number of its divisors (192).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3558759 + ... + 5958758.

Almost surely, 2^{11421020400000} is an apocalyptic number.

11421020400000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11421020400000 is an abundant number, since it is smaller than the sum of its proper divisors (26497913414160).

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

11421020400000 is an frugal number, since it uses more digits than its factorization.

11421020400000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9517559 (or 9517527 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 11421020400000 its reverse (402012411), we get a palindrome (11421422412411).

The spelling of 11421020400000 in words is "eleven trillion, four hundred twenty-one billion, twenty million, four hundred thousand".