211421321303 has 16 divisors (see below), whose sum is σ = 226740679680. Its totient is φ = 196688977056.

The previous prime is 211421321299. The next prime is 211421321311. The reversal of 211421321303 is 303123124112.

211421321303 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 211421321303 - 2² = 211421321299 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211421321333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 746600 + ... + 990077.

It is an arithmetic number, because the mean of its divisors is an integer number (14171292480).

Almost surely, 2^211421321303 is an apocalyptic number.

211421321303 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

211421321303 is a deficient number, since it is larger than the sum of its proper divisors (15319358377).

211421321303 is a wasteful number, since it uses less digits than its factorization.

211421321303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736846.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 211421321303 its reverse (303123124112), we get a palindrome (514544445415).

The spelling of 211421321303 in words is "two hundred eleven billion, four hundred twenty-one million, three hundred twenty-one thousand, three hundred three".