2154121325400 has 192 divisors, whose sum is σ = 7668260092800. Its totient is φ = 494726400000.

The previous prime is 2154121325357. The next prime is 2154121325407. The reversal of 2154121325400 is 45231214512.

It is a super-3 number, since 3×2154121325400³ (a number of 38 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154121325407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8463601 + ... + 8714400.

It is an arithmetic number, because the mean of its divisors is an integer number (39938854650).

Almost surely, 2^{2154121325400} is an apocalyptic number.

2154121325400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2154121325400 is an abundant number, since it is smaller than the sum of its proper divisors (5514138767400).

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

2154121325400 is a wasteful number, since it uses less digits than its factorization.

2154121325400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17178050 (or 17178041 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 2154121325400 its reverse (45231214512), we get a palindrome (2199352539912).

The spelling of 2154121325400 in words is "two trillion, one hundred fifty-four billion, one hundred twenty-one million, three hundred twenty-five thousand, four hundred".