20211211210 has 16 divisors (see below), whose sum is σ = 36383404392. Its totient is φ = 8083768000.

The previous prime is 20211211169. The next prime is 20211211213. The reversal of 20211211210 is 1211211202.

It can be written as a sum of positive squares in 4 ways, for example, as 19162034329 + 1049176881 = 138427^2 + 32391^2 .

It is not an unprimeable number, because it can be changed into a prime (20211211213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37500 + ... + 204520.

Almost surely, 2^20211211210 is an apocalyptic number.

20211211210 is a deficient number, since it is larger than the sum of its proper divisors (16172193182).

20211211210 is a wasteful number, since it uses less digits than its factorization.

20211211210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179129.

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

Adding to 20211211210 its reverse (1211211202), we get a palindrome (21422422412).

The spelling of 20211211210 in words is "twenty billion, two hundred eleven million, two hundred eleven thousand, two hundred ten".