106121986 has 4 divisors (see below), whose sum is σ = 159182982. Its totient is φ = 53060992.

The previous prime is 106121927. The next prime is 106121999. The reversal of 106121986 is 689121601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 689121601 = 7 ⋅98445943.

It can be written as a sum of positive squares in only one way, i.e., 60140025 + 45981961 = 7755^2 + 6781^2 .

It is a super-2 number, since 2×106121986² = 22523751825168392, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26530495 + ... + 26530498.

Almost surely, 2^106121986 is an apocalyptic number.

106121986 is a deficient number, since it is larger than the sum of its proper divisors (53060996).

106121986 is an equidigital number, since it uses as much as digits as its factorization.

106121986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53060995.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 106121986 is about 10301.5526014286. The cubic root of 106121986 is about 473.4438247424.

The spelling of 106121986 in words is "one hundred six million, one hundred twenty-one thousand, nine hundred eighty-six".