121022110221 has 16 divisors (see below), whose sum is σ = 161724120000. Its totient is φ = 80500831488.

The previous prime is 121022110211. The next prime is 121022110243. The reversal of 121022110221 is 122011220121.

It is not a de Polignac number, because 121022110221 - 2⁵ = 121022110189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121022110221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121022110211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9677845 + ... + 9690341.

It is an arithmetic number, because the mean of its divisors is an integer number (10107757500).

Almost surely, 2^121022110221 is an apocalyptic number.

It is an amenable number.

121022110221 is a deficient number, since it is larger than the sum of its proper divisors (40702009779).

121022110221 is a wasteful number, since it uses less digits than its factorization.

121022110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19468.

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

Adding to 121022110221 its reverse (122011220121), we get a palindrome (243033330342).

The spelling of 121022110221 in words is "one hundred twenty-one billion, twenty-two million, one hundred ten thousand, two hundred twenty-one".