2154421141140 has 192 divisors, whose sum is σ = 6194504429568. Its totient is φ = 559299417600.

The previous prime is 2154421141109. The next prime is 2154421141157. The reversal of 2154421141140 is 411411244512.

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

It is a junction number, because it is equal to n+sod(n) for n = 2154421141098 and 2154421141107.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 185384530 + ... + 185396150.

It is an arithmetic number, because the mean of its divisors is an integer number (32263043904).

Almost surely, 2^{2154421141140} is an apocalyptic number.

2154421141140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2154421141140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3097252214784).

2154421141140 is an abundant number, since it is smaller than the sum of its proper divisors (4040083288428).

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

2154421141140 is a wasteful number, since it uses less digits than its factorization.

2154421141140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12238 (or 12236 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

Adding to 2154421141140 its reverse (411411244512), we get a palindrome (2565832385652).

The spelling of 2154421141140 in words is "two trillion, one hundred fifty-four billion, four hundred twenty-one million, one hundred forty-one thousand, one hundred forty".