105121231 has 2 divisors, whose sum is σ = 105121232. Its totient is φ = 105121230.

The previous prime is 105121229. The next prime is 105121249. The reversal of 105121231 is 132121501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 105121231 - 2¹ = 105121229 is a prime.

It is a super-2 number, since 2×105121231² = 22100946413910722, which contains 22 as substring.

Together with 105121229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102121231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52560615 + 52560616.

It is an arithmetic number, because the mean of its divisors is an integer number (52560616).

Almost surely, 2^105121231 is an apocalyptic number.

105121231 is a deficient number, since it is larger than the sum of its proper divisors (1).

105121231 is an equidigital number, since it uses as much as digits as its factorization.

105121231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 105121231 is about 10252.8645265604. The cubic root of 105121231 is about 471.9508935194.

Adding to 105121231 its reverse (132121501), we get a palindrome (237242732).

The spelling of 105121231 in words is "one hundred five million, one hundred twenty-one thousand, two hundred thirty-one".