211230031247 has 2 divisors, whose sum is σ = 211230031248. Its totient is φ = 211230031246.

The previous prime is 211230031219. The next prime is 211230031253. The reversal of 211230031247 is 742130032112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211230031247 - 2¹⁰ = 211230030223 is a prime.

It is a super-2 number, since 2×211230031247² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211230051247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105615015623 + 105615015624.

It is an arithmetic number, because the mean of its divisors is an integer number (105615015624).

Almost surely, 2^211230031247 is an apocalyptic number.

211230031247 is a deficient number, since it is larger than the sum of its proper divisors (1).

211230031247 is an equidigital number, since it uses as much as digits as its factorization.

211230031247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

Adding to 211230031247 its reverse (742130032112), we get a palindrome (953360063359).

The spelling of 211230031247 in words is "two hundred eleven billion, two hundred thirty million, thirty-one thousand, two hundred forty-seven".