211230431031 has 4 divisors (see below), whose sum is σ = 281640574712. Its totient is φ = 140820287352.

The previous prime is 211230431029. The next prime is 211230431081. The reversal of 211230431031 is 130134032112.

211230431031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 211230431031 - 2¹ = 211230431029 is a prime.

It is a super-2 number, since 2×211230431031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211230430989 and 211230431007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211230431081) 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 3 ways as a sum of consecutive naturals, for example, 35205071836 + ... + 35205071841.

It is an arithmetic number, because the mean of its divisors is an integer number (70410143678).

Almost surely, 2^211230431031 is an apocalyptic number.

211230431031 is a deficient number, since it is larger than the sum of its proper divisors (70410143681).

211230431031 is an equidigital number, since it uses as much as digits as its factorization.

211230431031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70410143680.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 211230431031 its reverse (130134032112), we get a palindrome (341364463143).

The spelling of 211230431031 in words is "two hundred eleven billion, two hundred thirty million, four hundred thirty-one thousand, thirty-one".