211421403203 has 4 divisors (see below), whose sum is σ = 211526537688. Its totient is φ = 211316268720.

The previous prime is 211421403133. The next prime is 211421403233. The reversal of 211421403203 is 302304124112.

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 211421403203 - 2⁸ = 211421402947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211421403233) 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 in 3 ways as a sum of consecutive naturals, for example, 52564226 + ... + 52568247.

It is an arithmetic number, because the mean of its divisors is an integer number (52881634422).

Almost surely, 2^211421403203 is an apocalyptic number.

211421403203 is a deficient number, since it is larger than the sum of its proper divisors (105134485).

211421403203 is a wasteful number, since it uses less digits than its factorization.

211421403203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105134484.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 211421403203 its reverse (302304124112), we get a palindrome (513725527315).

The spelling of 211421403203 in words is "two hundred eleven billion, four hundred twenty-one million, four hundred three thousand, two hundred three".