210122220 has 96 divisors (see below), whose sum is σ = 733533696. Its totient is φ = 43660800.

The previous prime is 210122207. The next prime is 210122279. The reversal of 210122220 is 22221012.

210122220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 210122196 and 210122205.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18121 + ... + 27360.

It is an arithmetic number, because the mean of its divisors is an integer number (7640976).

Almost surely, 2^210122220 is an apocalyptic number.

210122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210122220 is an abundant number, since it is smaller than the sum of its proper divisors (523411476).

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

210122220 is a wasteful number, since it uses less digits than its factorization.

210122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45511 (or 45509 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 210122220 is about 14495.5931234289. The cubic root of 210122220 is about 594.5074849989.

Adding to 210122220 its reverse (22221012), we get a palindrome (232343232).

It can be divided in two parts, 21012 and 2220, that added together give a palindrome (23232).

The spelling of 210122220 in words is "two hundred ten million, one hundred twenty-two thousand, two hundred twenty".