2121403440411 has 20 divisors (see below), whose sum is σ = 3236435829792. Its totient is φ = 1384178128848.

The previous prime is 2121403440389. The next prime is 2121403440427. The reversal of 2121403440411 is 1140443041212.

2121403440411 is a `hidden beast` number, since 2 + 1 + 214 + 0 + 3 + 440 + 4 + 1 + 1 = 666.

It is not a de Polignac number, because 2121403440411 - 2²⁵ = 2121369885979 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2121403440461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 278614980 + ... + 278622593.

Almost surely, 2^{2121403440411} is an apocalyptic number.

2121403440411 is a deficient number, since it is larger than the sum of its proper divisors (1115032389381).

2121403440411 is an equidigital number, since it uses as much as digits as its factorization.

2121403440411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557237632 (or 557237623 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 2121403440411 its reverse (1140443041212), we get a palindrome (3261846481623).

The spelling of 2121403440411 in words is "two trillion, one hundred twenty-one billion, four hundred three million, four hundred forty thousand, four hundred eleven".