121101323222221 has 16 divisors (see below), whose sum is σ = 125059674539008. Its totient is φ = 117146223302400.

The previous prime is 121101323222197. The next prime is 121101323222249. The reversal of 121101323222221 is 122222323101121.

It is a cyclic number.

It is not a de Polignac number, because 121101323222221 - 2⁵ = 121101323222189 is a prime.

It is a super-2 number, since 2×121101323222221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121101323222291) 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, 745657936 + ... + 745820326.

It is an arithmetic number, because the mean of its divisors is an integer number (7816229658688).

Almost surely, 2^{121101323222221} is an apocalyptic number.

It is an amenable number.

121101323222221 is a deficient number, since it is larger than the sum of its proper divisors (3958351316787).

121101323222221 is a wasteful number, since it uses less digits than its factorization.

121101323222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172252.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 121101323222221 its reverse (122222323101121), we get a palindrome (243323646323342).

The spelling of 121101323222221 in words is "one hundred twenty-one trillion, one hundred one billion, three hundred twenty-three million, two hundred twenty-two thousand, two hundred twenty-one".