121101222221101 has 4 divisors (see below), whose sum is σ = 121101368439100. Its totient is φ = 121101076003104.

The previous prime is 121101222221093. The next prime is 121101222221123. The reversal of 121101222221101 is 101122222101121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90962494705476 + 30138727515625 = 9537426^2 + 5489875^2 .

It is a cyclic number.

It is not a de Polignac number, because 121101222221101 - 2³ = 121101222221093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121101222221501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71859546 + ... + 73525483.

It is an arithmetic number, because the mean of its divisors is an integer number (30275342109775).

Almost surely, 2^{121101222221101} is an apocalyptic number.

It is an amenable number.

121101222221101 is a deficient number, since it is larger than the sum of its proper divisors (146217999).

121101222221101 is an equidigital number, since it uses as much as digits as its factorization.

121101222221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146217998.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121101222221101 its reverse (101122222101121), we get a palindrome (222223444322222).

The spelling of 121101222221101 in words is "one hundred twenty-one trillion, one hundred one billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred one".