220120121210210 has 32 divisors (see below), whose sum is σ = 451794058741872. Its totient is φ = 76494232166400.

The previous prime is 220120121210189. The next prime is 220120121210257. The reversal of 220120121210210 is 12012121021022.

It can be written as a sum of positive squares in 8 ways, for example, as 165215829884161 + 54904291326049 = 12853631^2 + 7409743^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49800930191 + ... + 49800934610.

Almost surely, 2^{220120121210210} is an apocalyptic number.

220120121210210 is an abundant number, since it is smaller than the sum of its proper divisors (231673937531662).

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

220120121210210 is a wasteful number, since it uses less digits than its factorization.

220120121210210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99601864838.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 220120121210210 its reverse (12012121021022), we get a palindrome (232132242231232).

The spelling of 220120121210210 in words is "two hundred twenty trillion, one hundred twenty billion, one hundred twenty-one million, two hundred ten thousand, two hundred ten".