21043402283 has 2 divisors, whose sum is σ = 21043402284. Its totient is φ = 21043402282.

The previous prime is 21043402279. The next prime is 21043402339. The reversal of 21043402283 is 38220434012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21043402283 - 2² = 21043402279 is a prime.

It is a super-2 number, since 2×21043402283² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21043402273) 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 as a sum of consecutive naturals, namely, 10521701141 + 10521701142.

It is an arithmetic number, because the mean of its divisors is an integer number (10521701142).

Almost surely, 2^21043402283 is an apocalyptic number.

21043402283 is a deficient number, since it is larger than the sum of its proper divisors (1).

21043402283 is an equidigital number, since it uses as much as digits as its factorization.

21043402283 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21043402283 its reverse (38220434012), we get a palindrome (59263836295).

The spelling of 21043402283 in words is "twenty-one billion, forty-three million, four hundred two thousand, two hundred eighty-three".