2124121440 has 384 divisors, whose sum is σ = 8303275008. Its totient is φ = 445317120.

The previous prime is 2124121429. The next prime is 2124121451. The reversal of 2124121440 is 441214212.

It is an interprime number because it is at equal distance from previous prime (2124121429) and next prime (2124121451).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2341467 + ... + 2342373.

It is an arithmetic number, because the mean of its divisors is an integer number (21623112).

Almost surely, 2^2124121440 is an apocalyptic number.

2124121440 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 2124121440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4151637504).

2124121440 is an abundant number, since it is smaller than the sum of its proper divisors (6179153568).

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

2124121440 is a wasteful number, since it uses less digits than its factorization.

2124121440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990 (or 982 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 2124121440 is about 46088.1919801591. The cubic root of 2124121440 is about 1285.4635924625.

Adding to 2124121440 its reverse (441214212), we get a palindrome (2565335652).

The spelling of 2124121440 in words is "two billion, one hundred twenty-four million, one hundred twenty-one thousand, four hundred forty".