211121020021210 has 32 divisors (see below), whose sum is σ = 409930925805072. Its totient is φ = 77822672140800.

The previous prime is 211121020021193. The next prime is 211121020021217. The reversal of 211121020021210 is 12120020121112.

It can be written as a sum of positive squares in 8 ways, for example, as 78177975432561 + 132943044588649 = 8841831^2 + 11530093^2 .

It is not an unprimeable number, because it can be changed into a prime (211121020021217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1351009929 + ... + 1351166188.

Almost surely, 2^{211121020021210} is an apocalyptic number.

211121020021210 is a deficient number, since it is larger than the sum of its proper divisors (198809905783862).

211121020021210 is a wasteful number, since it uses less digits than its factorization.

211121020021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2702176738.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211121020021210 its reverse (12120020121112), we get a palindrome (223241040142322).

The spelling of 211121020021210 in words is "two hundred eleven trillion, one hundred twenty-one billion, twenty million, twenty-one thousand, two hundred ten".