21210001220210 has 16 divisors (see below), whose sum is σ = 41648729668992. Its totient is φ = 7712727716400.

The previous prime is 21210001220207. The next prime is 21210001220227. The reversal of 21210001220210 is 1202210001212.

It is a super-2 number, since 2×21210001220210² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96409096346 + ... + 96409096565.

It is an arithmetic number, because the mean of its divisors is an integer number (2603045604312).

Almost surely, 2^{21210001220210} is an apocalyptic number.

21210001220210 is a deficient number, since it is larger than the sum of its proper divisors (20438728448782).

21210001220210 is a wasteful number, since it uses less digits than its factorization.

21210001220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192818192929.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21210001220210 its reverse (1202210001212), we get a palindrome (22412211221422).

The spelling of 21210001220210 in words is "twenty-one trillion, two hundred ten billion, one million, two hundred twenty thousand, two hundred ten".