2111421104321 has 8 divisors (see below), whose sum is σ = 2115151365384. Its totient is φ = 2107691089920.

The previous prime is 2111421104311. The next prime is 2111421104329. The reversal of 2111421104321 is 1234011241112.

It can be written as a sum of positive squares in 4 ways, for example, as 222269817025 + 1889151287296 = 471455^2 + 1374464^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2111421104321 - 2⁶ = 2111421104257 is a prime.

It is a super-2 number, since 2×2111421104321² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2111421104329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29387081 + ... + 29458841.

It is an arithmetic number, because the mean of its divisors is an integer number (264393920673).

Almost surely, 2^{2111421104321} is an apocalyptic number.

It is an amenable number.

2111421104321 is a deficient number, since it is larger than the sum of its proper divisors (3730261063).

2111421104321 is an equidigital number, since it uses as much as digits as its factorization.

2111421104321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123331.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 2111421104321 its reverse (1234011241112), we get a palindrome (3345432345433).

The spelling of 2111421104321 in words is "two trillion, one hundred eleven billion, four hundred twenty-one million, one hundred four thousand, three hundred twenty-one".