2121342414440 has 64 divisors (see below), whose sum is σ = 5024459419200. Its totient is φ = 803840744448.

The previous prime is 2121342414437. The next prime is 2121342414461. The reversal of 2121342414440 is 444142431212.

It is a junction number, because it is equal to n+sod(n) for n = 2121342414397 and 2121342414406.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21646832 + ... + 21744608.

It is an arithmetic number, because the mean of its divisors is an integer number (78507178425).

Almost surely, 2^{2121342414440} is an apocalyptic number.

2121342414440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121342414440 is an abundant number, since it is smaller than the sum of its proper divisors (2903117004760).

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

2121342414440 is a wasteful number, since it uses less digits than its factorization.

2121342414440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126354 (or 126350 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 2121342414440 its reverse (444142431212), we get a palindrome (2565484845652).

The spelling of 2121342414440 in words is "two trillion, one hundred twenty-one billion, three hundred forty-two million, four hundred fourteen thousand, four hundred forty".