211220321210 has 16 divisors (see below), whose sum is σ = 390472162056. Its totient is φ = 82204665408.

The previous prime is 211220321203. The next prime is 211220321233. The reversal of 211220321210 is 12123022112.

It can be written as a sum of positive squares in 4 ways, for example, as 211137493009 + 82828201 = 459497^2 + 9101^2 .

It is a super-2 number, since 2×211220321210² (a number of 23 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, 285432497 + ... + 285433236.

Almost surely, 2^211220321210 is an apocalyptic number.

211220321210 is a deficient number, since it is larger than the sum of its proper divisors (179251840846).

211220321210 is a wasteful number, since it uses less digits than its factorization.

211220321210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570865777.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 211220321210 its reverse (12123022112), we get a palindrome (223343343322).

The spelling of 211220321210 in words is "two hundred eleven billion, two hundred twenty million, three hundred twenty-one thousand, two hundred ten".