21141440201243 has 2 divisors, whose sum is σ = 21141440201244. Its totient is φ = 21141440201242.

The previous prime is 21141440201207. The next prime is 21141440201303. The reversal of 21141440201243 is 34210204414112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21141440201243 - 2¹⁶ = 21141440135707 is a prime.

It is not a weakly prime, because it can be changed into another prime (21141440201743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570720100621 + 10570720100622.

It is an arithmetic number, because the mean of its divisors is an integer number (10570720100622).

Almost surely, 2^{21141440201243} is an apocalyptic number.

21141440201243 is a deficient number, since it is larger than the sum of its proper divisors (1).

21141440201243 is an equidigital number, since it uses as much as digits as its factorization.

21141440201243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 21141440201243 its reverse (34210204414112), we get a palindrome (55351644615355).

The spelling of 21141440201243 in words is "twenty-one trillion, one hundred forty-one billion, four hundred forty million, two hundred one thousand, two hundred forty-three".