2123240300440 has 128 divisors (see below), whose sum is σ = 5578026376320. Its totient is φ = 712323072000.

The previous prime is 2123240300407. The next prime is 2123240300477. The reversal of 2123240300440 is 440030423212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2974390 + ... + 3618490.

It is an arithmetic number, because the mean of its divisors is an integer number (43578331065).

Almost surely, 2^{2123240300440} is an apocalyptic number.

2123240300440 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 2123240300440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2789013188160).

2123240300440 is an abundant number, since it is smaller than the sum of its proper divisors (3454786075880).

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

2123240300440 is a wasteful number, since it uses less digits than its factorization.

2123240300440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644373 (or 644369 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 2123240300440 its reverse (440030423212), we get a palindrome (2563270723652).

The spelling of 2123240300440 in words is "two trillion, one hundred twenty-three billion, two hundred forty million, three hundred thousand, four hundred forty".