20121211210 has 32 divisors (see below), whose sum is σ = 37812044160. Its totient is φ = 7694647488.

The previous prime is 20121211171. The next prime is 20121211267. The reversal of 20121211210 is 1211212102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 454729 + ... + 497011.

It is an arithmetic number, because the mean of its divisors is an integer number (1181626380).

Almost surely, 2^20121211210 is an apocalyptic number.

20121211210 is a deficient number, since it is larger than the sum of its proper divisors (17690832950).

20121211210 is a wasteful number, since it uses less digits than its factorization.

20121211210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44382.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20121211210 its reverse (1211212102), we get a palindrome (21332423312).

The spelling of 20121211210 in words is "twenty billion, one hundred twenty-one million, two hundred eleven thousand, two hundred ten".