220121210 has 32 divisors (see below), whose sum is σ = 414554112. Its totient is φ = 84065920.

The previous prime is 220121203. The next prime is 220121233. The reversal of 220121210 is 12121022.

It is a happy number.

220121210 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×220121210³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220121191 and 220121200.

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, 13559 + ... + 24981.

It is an arithmetic number, because the mean of its divisors is an integer number (12954816).

Almost surely, 2^220121210 is an apocalyptic number.

220121210 is a deficient number, since it is larger than the sum of its proper divisors (194432902).

220121210 is a wasteful number, since it uses less digits than its factorization.

220121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11518.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 220121210 is about 14836.4823998143. The cubic root of 220121210 is about 603.7919202690.

Adding to 220121210 its reverse (12121022), we get a palindrome (232242232).

The spelling of 220121210 in words is "two hundred twenty million, one hundred twenty-one thousand, two hundred ten".