20110121021210 has 32 divisors (see below), whose sum is σ = 39490825456512. Its totient is φ = 7312426735680.

The previous prime is 20110121021191. The next prime is 20110121021213. The reversal of 20110121021210 is 1212012101102.

It is not an unprimeable number, because it can be changed into a prime (20110121021213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1955702 + ... + 6636641.

It is an arithmetic number, because the mean of its divisors is an integer number (1234088295516).

Almost surely, 2^{20110121021210} is an apocalyptic number.

20110121021210 is a deficient number, since it is larger than the sum of its proper divisors (19380704435302).

20110121021210 is a wasteful number, since it uses less digits than its factorization.

20110121021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8613638.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20110121021210 its reverse (1212012101102), we get a palindrome (21322133122312).

The spelling of 20110121021210 in words is "twenty trillion, one hundred ten billion, one hundred twenty-one million, twenty-one thousand, two hundred ten".