211230211310031 has 4 divisors (see below), whose sum is σ = 281640281746712. Its totient is φ = 140820140873352.

The previous prime is 211230211310023. The next prime is 211230211310059. The reversal of 211230211310031 is 130013112032112.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 211230211310031 - 2³ = 211230211310023 is a prime.

It is a super-2 number, since 2×211230211310031² (a number of 29 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 (211230211360031) 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 3 ways as a sum of consecutive naturals, for example, 35205035218336 + ... + 35205035218341.

It is an arithmetic number, because the mean of its divisors is an integer number (70410070436678).

Almost surely, 2^{211230211310031} is an apocalyptic number.

211230211310031 is a deficient number, since it is larger than the sum of its proper divisors (70410070436681).

211230211310031 is an equidigital number, since it uses as much as digits as its factorization.

211230211310031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70410070436680.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 211230211310031 its reverse (130013112032112), we get a palindrome (341243323342143).

The spelling of 211230211310031 in words is "two hundred eleven trillion, two hundred thirty billion, two hundred eleven million, three hundred ten thousand, thirty-one".