1031210105 has 4 divisors (see below), whose sum is σ = 1237452132. Its totient is φ = 824968080.

The previous prime is 1031210099. The next prime is 1031210107. The reversal of 1031210105 is 5010121301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5010121301 = 3767 ⋅1330003.

It can be written as a sum of positive squares in 2 ways, for example, as 108326464 + 922883641 = 10408^2 + 30379^2 .

It is not a de Polignac number, because 1031210105 - 2⁶ = 1031210041 is a prime.

It is a super-2 number, since 2×1031210105² = 2126788561308222050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1031210105.

It is not an unprimeable number, because it can be changed into a prime (1031210107) 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, 103121006 + ... + 103121015.

It is an arithmetic number, because the mean of its divisors is an integer number (309363033).

Almost surely, 2^1031210105 is an apocalyptic number.

It is an amenable number.

1031210105 is a deficient number, since it is larger than the sum of its proper divisors (206242027).

1031210105 is an equidigital number, since it uses as much as digits as its factorization.

1031210105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206242026.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 1031210105 is about 32112.4602763476. The cubic root of 1031210105 is about 1010.2969766828.

Adding to 1031210105 its reverse (5010121301), we get a palindrome (6041331406).

The spelling of 1031210105 in words is "one billion, thirty-one million, two hundred ten thousand, one hundred five".