211021300231 has 4 divisors (see below), whose sum is σ = 241167200272. Its totient is φ = 180875400192.

The previous prime is 211021300229. The next prime is 211021300241. The reversal of 211021300231 is 132003120112.

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 211021300231 - 2¹ = 211021300229 is a prime.

It is a super-2 number, since 2×211021300231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211021300241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15072950010 + ... + 15072950023.

It is an arithmetic number, because the mean of its divisors is an integer number (60291800068).

Almost surely, 2^211021300231 is an apocalyptic number.

211021300231 is a deficient number, since it is larger than the sum of its proper divisors (30145900041).

211021300231 is an equidigital number, since it uses as much as digits as its factorization.

211021300231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30145900040.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 211021300231 its reverse (132003120112), we get a palindrome (343024420343).

The spelling of 211021300231 in words is "two hundred eleven billion, twenty-one million, three hundred thousand, two hundred thirty-one".