210011221221020 has 12 divisors (see below), whose sum is σ = 441023564564184. Its totient is φ = 84004488488400.

The previous prime is 210011221221001. The next prime is 210011221221047. The reversal of 210011221221020 is 20122122110012.

210011221221020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 210011221221020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5250280530506 + ... + 5250280530545.

It is an arithmetic number, because the mean of its divisors is an integer number (36751963713682).

Almost surely, 2^{210011221221020} is an apocalyptic number.

210011221221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210011221221020 is an abundant number, since it is smaller than the sum of its proper divisors (231012343343164).

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

210011221221020 is a wasteful number, since it uses less digits than its factorization.

210011221221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10500561061060 (or 10500561061058 counting only the distinct ones).

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

Adding to 210011221221020 its reverse (20122122110012), we get a palindrome (230133343331032).

The spelling of 210011221221020 in words is "two hundred ten trillion, eleven billion, two hundred twenty-one million, two hundred twenty-one thousand, twenty".