20121210010 has 32 divisors (see below), whose sum is σ = 39523401792. Its totient is φ = 7314458880.

The previous prime is 20121209993. The next prime is 20121210017. The reversal of 20121210010 is 1001212102.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (20121210017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336114 + ... + 391426.

It is an arithmetic number, because the mean of its divisors is an integer number (1235106306).

Almost surely, 2^20121210010 is an apocalyptic number.

20121210010 is a deficient number, since it is larger than the sum of its proper divisors (19402191782).

20121210010 is a wasteful number, since it uses less digits than its factorization.

20121210010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58638.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20121210010 its reverse (1001212102), we get a palindrome (21122422112).

The spelling of 20121210010 in words is "twenty billion, one hundred twenty-one million, two hundred ten thousand, ten".