21402044102443 has 2 divisors, whose sum is σ = 21402044102444. Its totient is φ = 21402044102442.

The previous prime is 21402044102401. The next prime is 21402044102471. The reversal of 21402044102443 is 34420144020412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21402044102443 - 2⁹ = 21402044101931 is a prime.

It is not a weakly prime, because it can be changed into another prime (21402044105443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10701022051221 + 10701022051222.

It is an arithmetic number, because the mean of its divisors is an integer number (10701022051222).

Almost surely, 2^{21402044102443} is an apocalyptic number.

21402044102443 is a deficient number, since it is larger than the sum of its proper divisors (1).

21402044102443 is an equidigital number, since it uses as much as digits as its factorization.

21402044102443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 21402044102443 its reverse (34420144020412), we get a palindrome (55822188122855).

The spelling of 21402044102443 in words is "twenty-one trillion, four hundred two billion, forty-four million, one hundred two thousand, four hundred forty-three".