20121210210 has 32 divisors (see below), whose sum is σ = 48319483392. Its totient is φ = 5362480640.

The previous prime is 20121210209. The next prime is 20121210211. The reversal of 20121210210 is 1201212102.

It is an interprime number because it is at equal distance from previous prime (20121210209) and next prime (20121210211).

It is not an unprimeable number, because it can be changed into a prime (20121210211) 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, 146706 + ... + 248525.

It is an arithmetic number, because the mean of its divisors is an integer number (1509983856).

Almost surely, 2^20121210210 is an apocalyptic number.

20121210210 is an abundant number, since it is smaller than the sum of its proper divisors (28198273182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20121210210 is a wasteful number, since it uses less digits than its factorization.

20121210210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396938.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20121210210 its reverse (1201212102), we get a palindrome (21322422312).

The spelling of 20121210210 in words is "twenty billion, one hundred twenty-one million, two hundred ten thousand, two hundred ten".