211245301421 has 16 divisors (see below), whose sum is σ = 277232386560. Its totient is φ = 155943215280.

The previous prime is 211245301411. The next prime is 211245301433. The reversal of 211245301421 is 124103542112.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211245301421 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211245301411) 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 15 ways as a sum of consecutive naturals, for example, 72194471 + ... + 72197396.

It is an arithmetic number, because the mean of its divisors is an integer number (17327024160).

Almost surely, 2^211245301421 is an apocalyptic number.

It is an amenable number.

211245301421 is a deficient number, since it is larger than the sum of its proper divisors (65987085139).

211245301421 is a wasteful number, since it uses less digits than its factorization.

211245301421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144391904.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 211245301421 its reverse (124103542112), we get a palindrome (335348843533).

The spelling of 211245301421 in words is "two hundred eleven billion, two hundred forty-five million, three hundred one thousand, four hundred twenty-one".