105121994 has 8 divisors (see below), whose sum is σ = 159454980. Its totient is φ = 51970336.

The previous prime is 105121993. The next prime is 105122009. The reversal of 105121994 is 499121501.

It can be written as a sum of positive squares in 2 ways, for example, as 94965025 + 10156969 = 9745^2 + 3187^2 .

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

It is a super-2 number, since 2×105121994² = 22101267245072072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 105121994.

It is not an unprimeable number, because it can be changed into a prime (105121993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295109 + ... + 295464.

Almost surely, 2^105121994 is an apocalyptic number.

105121994 is a deficient number, since it is larger than the sum of its proper divisors (54332986).

105121994 is an equidigital number, since it uses as much as digits as its factorization.

105121994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590664.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 105121994 is about 10252.9017356064. The cubic root of 105121994 is about 471.9520353683.

The spelling of 105121994 in words is "one hundred five million, one hundred twenty-one thousand, nine hundred ninety-four".