211230230421 has 96 divisors (see below), whose sum is σ = 343108846080. Its totient is φ = 115107350400.

The previous prime is 211230230401. The next prime is 211230230483. The reversal of 211230230421 is 124032032112.

211230230421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211230230421 - 2⁵ = 211230230389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211230230401) 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 95 ways as a sum of consecutive naturals, for example, 260456106 + ... + 260456916.

It is an arithmetic number, because the mean of its divisors is an integer number (3574050480).

Almost surely, 2^211230230421 is an apocalyptic number.

211230230421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211230230421 is a deficient number, since it is larger than the sum of its proper divisors (131878615659).

211230230421 is a wasteful number, since it uses less digits than its factorization.

211230230421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535 (or 1528 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 211230230421 its reverse (124032032112), we get a palindrome (335262262533).

The spelling of 211230230421 in words is "two hundred eleven billion, two hundred thirty million, two hundred thirty thousand, four hundred twenty-one".