21111340221241 has 16 divisors (see below), whose sum is σ = 22423661850240. Its totient is φ = 19819210118400.

The previous prime is 21111340221229. The next prime is 21111340221253. The reversal of 21111340221241 is 14212204311112.

It is an interprime number because it is at equal distance from previous prime (21111340221229) and next prime (21111340221253).

It is a cyclic number.

It is not a de Polignac number, because 21111340221241 - 2¹³ = 21111340213049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21111340221941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9636771 + ... + 11622823.

It is an arithmetic number, because the mean of its divisors is an integer number (1401478865640).

Almost surely, 2^{21111340221241} is an apocalyptic number.

It is an amenable number.

21111340221241 is a deficient number, since it is larger than the sum of its proper divisors (1312321628999).

21111340221241 is a wasteful number, since it uses less digits than its factorization.

21111340221241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991136.

The product of its (nonzero) digits is 768, while the sum is 25.

Adding to 21111340221241 its reverse (14212204311112), we get a palindrome (35323544532353).

The spelling of 21111340221241 in words is "twenty-one trillion, one hundred eleven billion, three hundred forty million, two hundred twenty-one thousand, two hundred forty-one".