20121002206 has 16 divisors (see below), whose sum is σ = 30308419440. Its totient is φ = 10018270080.

The previous prime is 20121002201. The next prime is 20121002219. The reversal of 20121002206 is 60220012102.

It is a self number, because there is not a number n which added to its sum of digits gives 20121002206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121002201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 540741 + ... + 576751.

It is an arithmetic number, because the mean of its divisors is an integer number (1894276215).

Almost surely, 2^20121002206 is an apocalyptic number.

20121002206 is a deficient number, since it is larger than the sum of its proper divisors (10187417234).

20121002206 is a wasteful number, since it uses less digits than its factorization.

20121002206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37179.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20121002206 its reverse (60220012102), we get a palindrome (80341014308).

The spelling of 20121002206 in words is "twenty billion, one hundred twenty-one million, two thousand, two hundred six".