20121305404000 has 48 divisors (see below), whose sum is σ = 49438047387456. Its totient is φ = 8048522160000.

The previous prime is 20121305403989. The next prime is 20121305404061. The reversal of 20121305404000 is 40450312102.

It is a super-2 number, since 2×20121305404000² (a number of 27 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 2515159176 + ... + 2515167175.

It is an arithmetic number, because the mean of its divisors is an integer number (1029959320572).

Almost surely, 2^{20121305404000} is an apocalyptic number.

20121305404000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121305404000 is an abundant number, since it is smaller than the sum of its proper divisors (29316741983456).

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

20121305404000 is an equidigital number, since it uses as much as digits as its factorization.

20121305404000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5030326376 (or 5030326358 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 20121305404000 its reverse (40450312102), we get a palindrome (20161755716102).

The spelling of 20121305404000 in words is "twenty trillion, one hundred twenty-one billion, three hundred five million, four hundred four thousand".