20211211021210 has 128 divisors (see below), whose sum is σ = 41833755279360. Its totient is φ = 6958599648000.

The previous prime is 20211211021193. The next prime is 20211211021213. The reversal of 20211211021210 is 1212011211202.

It is not an unprimeable number, because it can be changed into a prime (20211211021213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1348935379 + ... + 1348950361.

It is an arithmetic number, because the mean of its divisors is an integer number (326826213120).

Almost surely, 2^{20211211021210} is an apocalyptic number.

20211211021210 is an abundant number, since it is smaller than the sum of its proper divisors (21622544258150).

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

20211211021210 is a wasteful number, since it uses less digits than its factorization.

20211211021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20404.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20211211021210 its reverse (1212011211202), we get a palindrome (21423222232412).

The spelling of 20211211021210 in words is "twenty trillion, two hundred eleven billion, two hundred eleven million, twenty-one thousand, two hundred ten".