121010201221 has 32 divisors (see below), whose sum is σ = 158759014400. Its totient is φ = 89556891840.

The previous prime is 121010201209. The next prime is 121010201237. The reversal of 121010201221 is 122102010121.

It is not a de Polignac number, because 121010201221 - 2¹¹ = 121010199173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010201021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 306375 + ... + 579556.

It is an arithmetic number, because the mean of its divisors is an integer number (4961219200).

Almost surely, 2^121010201221 is an apocalyptic number.

It is an amenable number.

121010201221 is a deficient number, since it is larger than the sum of its proper divisors (37748813179).

121010201221 is a wasteful number, since it uses less digits than its factorization.

121010201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886049.

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

Adding to 121010201221 its reverse (122102010121), we get a palindrome (243112211342).

The spelling of 121010201221 in words is "one hundred twenty-one billion, ten million, two hundred one thousand, two hundred twenty-one".