102001201221 has 16 divisors (see below), whose sum is σ = 138832657920. Its totient is φ = 66594038640.

The previous prime is 102001201193. The next prime is 102001201231. The reversal of 102001201221 is 122102100201.

It is not a de Polignac number, because 102001201221 - 2⁶ = 102001201157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102001201197 and 102001201206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102001201231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1049035 + ... + 1142136.

It is an arithmetic number, because the mean of its divisors is an integer number (8677041120).

Almost surely, 2^102001201221 is an apocalyptic number.

It is an amenable number.

102001201221 is a deficient number, since it is larger than the sum of its proper divisors (36831456699).

102001201221 is a wasteful number, since it uses less digits than its factorization.

102001201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191496.

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

Adding to 102001201221 its reverse (122102100201), we get a palindrome (224103301422).

The spelling of 102001201221 in words is "one hundred two billion, one million, two hundred one thousand, two hundred twenty-one".