4221516203123 has 2 divisors, whose sum is σ = 4221516203124. Its totient is φ = 4221516203122.

The previous prime is 4221516203117. The next prime is 4221516203141. The reversal of 4221516203123 is 3213026151224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4221516203123 - 2⁸ = 4221516202867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4221516203123.

It is not a weakly prime, because it can be changed into another prime (4221516203143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110758101561 + 2110758101562.

It is an arithmetic number, because the mean of its divisors is an integer number (2110758101562).

Almost surely, 2^{4221516203123} is an apocalyptic number.

4221516203123 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221516203123 is an equidigital number, since it uses as much as digits as its factorization.

4221516203123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 4221516203123 in words is "four trillion, two hundred twenty-one billion, five hundred sixteen million, two hundred three thousand, one hundred twenty-three".