21142103402303 has 4 divisors (see below), whose sum is σ = 22768419048648. Its totient is φ = 19515787755960.

The previous prime is 21142103402293. The next prime is 21142103402309. The reversal of 21142103402303 is 30320430124112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21142103402303 - 2¹⁴ = 21142103385919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142103402309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 813157823153 + ... + 813157823178.

It is an arithmetic number, because the mean of its divisors is an integer number (5692104762162).

Almost surely, 2^{21142103402303} is an apocalyptic number.

21142103402303 is a deficient number, since it is larger than the sum of its proper divisors (1626315646345).

21142103402303 is a wasteful number, since it uses less digits than its factorization.

21142103402303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626315646344.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21142103402303 its reverse (30320430124112), we get a palindrome (51462533526415).

The spelling of 21142103402303 in words is "twenty-one trillion, one hundred forty-two billion, one hundred three million, four hundred two thousand, three hundred three".