1210000201221 has 16 divisors (see below), whose sum is σ = 1843875145728. Its totient is φ = 691404193200.

The previous prime is 1210000201187. The next prime is 1210000201237. The reversal of 1210000201221 is 1221020000121.

It is not a de Polignac number, because 1210000201221 - 2¹¹ = 1210000199173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210000201197 and 1210000201206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210000201321) 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, 404985 + ... + 1607486.

It is an arithmetic number, because the mean of its divisors is an integer number (115242196608).

Almost surely, 2^{1210000201221} is an apocalyptic number.

It is an amenable number.

1210000201221 is a deficient number, since it is larger than the sum of its proper divisors (633874944507).

1210000201221 is a wasteful number, since it uses less digits than its factorization.

1210000201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041112.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1210000201221 its reverse (1221020000121), we get a palindrome (2431020201342).

The spelling of 1210000201221 in words is "one trillion, two hundred ten billion, two hundred one thousand, two hundred twenty-one".