20121106 has 4 divisors (see below), whose sum is σ = 30181662. Its totient is φ = 10060552.

The previous prime is 20121103. The next prime is 20121107. The reversal of 20121106 is 60112102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20025625 + 95481 = 4475^2 + 309^2 .

It is not an unprimeable number, because it can be changed into a prime (20121103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5030275 + ... + 5030278.

Almost surely, 2^20121106 is an apocalyptic number.

20121106 is a deficient number, since it is larger than the sum of its proper divisors (10060556).

20121106 is a wasteful number, since it uses less digits than its factorization.

20121106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10060555.

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

The square root of 20121106 is about 4485.6555819635. The cubic root of 20121106 is about 271.9885465910.

Adding to 20121106 its reverse (60112102), we get a palindrome (80233208).

The spelling of 20121106 in words is "twenty million, one hundred twenty-one thousand, one hundred six".