121010221221 has 8 divisors (see below), whose sum is σ = 166910650080. Its totient is φ = 77891636592.

The previous prime is 121010221217. The next prime is 121010221231. The reversal of 121010221221 is 122122010121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121010221221 - 2² = 121010221217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121010221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010221231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 695460955 + ... + 695461128.

It is an arithmetic number, because the mean of its divisors is an integer number (20863831260).

Almost surely, 2^121010221221 is an apocalyptic number.

It is an amenable number.

121010221221 is a deficient number, since it is larger than the sum of its proper divisors (45900428859).

121010221221 is a wasteful number, since it uses less digits than its factorization.

121010221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390922115.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121010221221 its reverse (122122010121), we get a palindrome (243132231342).

The spelling of 121010221221 in words is "one hundred twenty-one billion, ten million, two hundred twenty-one thousand, two hundred twenty-one".