201221112010 has 16 divisors (see below), whose sum is σ = 362587897800. Its totient is φ = 80401801216.

The previous prime is 201221111989. The next prime is 201221112049. The reversal of 201221112010 is 10211122102.

201221112010 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 4 ways, for example, as 57016365961 + 144204746049 = 238781^2 + 379743^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10820695 + ... + 10839274.

Almost surely, 2^201221112010 is an apocalyptic number.

201221112010 is a deficient number, since it is larger than the sum of its proper divisors (161366785790).

201221112010 is a wasteful number, since it uses less digits than its factorization.

201221112010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21660905.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201221112010 its reverse (10211122102), we get a palindrome (211432234112).

The spelling of 201221112010 in words is "two hundred one billion, two hundred twenty-one million, one hundred twelve thousand, ten".