105121031 has 8 divisors (see below), whose sum is σ = 108662784. Its totient is φ = 101588760.

The previous prime is 105121021. The next prime is 105121039. The reversal of 105121031 is 130121501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105121031 is a prime.

It is a super-2 number, since 2×105121031² = 22100862317005922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 105120997 and 105121015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105121039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25586 + ... + 29408.

It is an arithmetic number, because the mean of its divisors is an integer number (13582848).

Almost surely, 2^105121031 is an apocalyptic number.

105121031 is a deficient number, since it is larger than the sum of its proper divisors (3541753).

105121031 is an equidigital number, since it uses as much as digits as its factorization.

105121031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4741.

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

The square root of 105121031 is about 10252.8547731839. The cubic root of 105121031 is about 471.9505942135.

Adding to 105121031 its reverse (130121501), we get a palindrome (235242532).

The spelling of 105121031 in words is "one hundred five million, one hundred twenty-one thousand, thirty-one".