210121222011220 has 48 divisors (see below), whose sum is σ = 475297080289920. Its totient is φ = 77566917557376.

The previous prime is 210121222011209. The next prime is 210121222011263. The reversal of 210121222011220 is 22110222121012.

210121222011220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83671102 + ... + 86145781.

It is an arithmetic number, because the mean of its divisors is an integer number (9902022506040).

Almost surely, 2^{210121222011220} is an apocalyptic number.

210121222011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210121222011220 is an abundant number, since it is smaller than the sum of its proper divisors (265175858278700).

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

210121222011220 is a wasteful number, since it uses less digits than its factorization.

210121222011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169821664 (or 169821662 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 210121222011220 its reverse (22110222121012), we get a palindrome (232231444132232).

The spelling of 210121222011220 in words is "two hundred ten trillion, one hundred twenty-one billion, two hundred twenty-two million, eleven thousand, two hundred twenty".