21120106 has 8 divisors (see below), whose sum is σ = 36205920. Its totient is φ = 9051468.

The previous prime is 21120089. The next prime is 21120109. The reversal of 21120106 is 60102112.

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

It is a super-3 number, since 3×21120106³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21120109) 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, 754276 + ... + 754303.

It is an arithmetic number, because the mean of its divisors is an integer number (4525740).

Almost surely, 2^21120106 is an apocalyptic number.

21120106 is a deficient number, since it is larger than the sum of its proper divisors (15085814).

21120106 is a wasteful number, since it uses less digits than its factorization.

21120106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508588.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 21120106 is about 4595.6616498607. The cubic root of 21120106 is about 276.4173916396.

Adding to 21120106 its reverse (60102112), we get a palindrome (81222218).

The spelling of 21120106 in words is "twenty-one million, one hundred twenty thousand, one hundred six".