210101231 has 4 divisors (see below), whose sum is σ = 210167352. Its totient is φ = 210035112.

The previous prime is 210101189. The next prime is 210101273. The reversal of 210101231 is 132101012.

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

It is an interprime number because it is at equal distance from previous prime (210101189) and next prime (210101273).

It is a cyclic number.

It is not a de Polignac number, because 210101231 - 2¹⁸ = 209839087 is a prime.

It is a super-2 number, since 2×210101231² = 88285054535430722, which 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 (210101431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28040 + ... + 34733.

It is an arithmetic number, because the mean of its divisors is an integer number (52541838).

Almost surely, 2^210101231 is an apocalyptic number.

210101231 is a deficient number, since it is larger than the sum of its proper divisors (66121).

210101231 is an equidigital number, since it uses as much as digits as its factorization.

210101231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66120.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 210101231 is about 14494.8691266945. The cubic root of 210101231 is about 594.4876893246.

Adding to 210101231 its reverse (132101012), we get a palindrome (342202243).

The spelling of 210101231 in words is "two hundred ten million, one hundred one thousand, two hundred thirty-one".