106800021 has 12 divisors (see below), whose sum is σ = 156220480. Its totient is φ = 70298280.

The previous prime is 106799989. The next prime is 106800037. The reversal of 106800021 is 120008601.

It is not a de Polignac number, because 106800021 - 2⁵ = 106799989 is a prime.

It is a super-2 number, since 2×106800021² = 22812488971200882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 106799967 and 106800003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106800041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74395 + ... + 75816.

Almost surely, 2^106800021 is an apocalyptic number.

It is an amenable number.

106800021 is a deficient number, since it is larger than the sum of its proper divisors (49420459).

106800021 is a wasteful number, since it uses less digits than its factorization.

106800021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150296 (or 150293 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 106800021 is about 10334.4095622343. The cubic root of 106800021 is about 474.4499946008.

Adding to 106800021 its reverse (120008601), we get a palindrome (226808622).

The spelling of 106800021 in words is "one hundred six million, eight hundred thousand, twenty-one".