231061211 has 2 divisors, whose sum is σ = 231061212. Its totient is φ = 231061210.

The previous prime is 231061141. The next prime is 231061213. The reversal of 231061211 is 112160132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231061211 - 2¹⁸ = 230799067 is a prime.

Together with 231061213, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231061211.

It is not a weakly prime, because it can be changed into another prime (231061213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115530605 + 115530606.

It is an arithmetic number, because the mean of its divisors is an integer number (115530606).

Almost surely, 2^231061211 is an apocalyptic number.

231061211 is a deficient number, since it is larger than the sum of its proper divisors (1).

231061211 is an equidigital number, since it uses as much as digits as its factorization.

231061211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 231061211 is about 15200.6977142498. The cubic root of 231061211 is about 613.6334351382.

The spelling of 231061211 in words is "two hundred thirty-one million, sixty-one thousand, two hundred eleven".