211230300405 has 16 divisors (see below), whose sum is σ = 338029717824. Its totient is φ = 112635747840.

The previous prime is 211230300401. The next prime is 211230300439. The reversal of 211230300405 is 504003032112.

It is not a de Polignac number, because 211230300405 - 2² = 211230300401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211230300401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1190044 + ... + 1355973.

It is an arithmetic number, because the mean of its divisors is an integer number (21126857364).

Almost surely, 2^211230300405 is an apocalyptic number.

It is an amenable number.

211230300405 is a deficient number, since it is larger than the sum of its proper divisors (126799417419).

211230300405 is a wasteful number, since it uses less digits than its factorization.

211230300405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551556.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 211230300405 its reverse (504003032112), we get a palindrome (715233332517).

The spelling of 211230300405 in words is "two hundred eleven billion, two hundred thirty million, three hundred thousand, four hundred five".