210220121101220 has 12 divisors (see below), whose sum is σ = 441462254312604. Its totient is φ = 84088048440480.

The previous prime is 210220121101213. The next prime is 210220121101223. The reversal of 210220121101220 is 22101121022012.

It can be written as a sum of positive squares in 2 ways, for example, as 102086410703524 + 108133710397696 = 10103782^2 + 10398736^2 .

It is not an unprimeable number, because it can be changed into a prime (210220121101223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5255503027511 + ... + 5255503027550.

It is an arithmetic number, because the mean of its divisors is an integer number (36788521192717).

Almost surely, 2^{210220121101220} is an apocalyptic number.

210220121101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210220121101220 is an abundant number, since it is smaller than the sum of its proper divisors (231242133211384).

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

210220121101220 is a wasteful number, since it uses less digits than its factorization.

210220121101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10511006055070 (or 10511006055068 counting only the distinct ones).

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

Adding to 210220121101220 its reverse (22101121022012), we get a palindrome (232321242123232).

The spelling of 210220121101220 in words is "two hundred ten trillion, two hundred twenty billion, one hundred twenty-one million, one hundred one thousand, two hundred twenty".