201121220210 has 32 divisors (see below), whose sum is σ = 378209574000. Its totient is φ = 76905337600.

The previous prime is 201121220189. The next prime is 201121220213. The reversal of 201121220210 is 12022121102.

201121220210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 89001385561 + 112119834649 = 298331^2 + 334843^2 .

It is not an unprimeable number, because it can be changed into a prime (201121220213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3403985 + ... + 3462564.

Almost surely, 2^201121220210 is an apocalyptic number.

201121220210 is a deficient number, since it is larger than the sum of its proper divisors (177088353790).

201121220210 is a wasteful number, since it uses less digits than its factorization.

201121220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6866686.

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

Adding to 201121220210 its reverse (12022121102), we get a palindrome (213143341312).

The spelling of 201121220210 in words is "two hundred one billion, one hundred twenty-one million, two hundred twenty thousand, two hundred ten".