121120001022221 has 4 divisors (see below), whose sum is σ = 121142484784992. Its totient is φ = 121097517259452.

The previous prime is 121120001022101. The next prime is 121120001022227. The reversal of 121120001022221 is 122220100021121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121120001022221 - 2²⁶ = 121119933913357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121120001022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121120001022227) 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, 11241873305 + ... + 11241884078.

It is an arithmetic number, because the mean of its divisors is an integer number (30285621196248).

Almost surely, 2^{121120001022221} is an apocalyptic number.

It is an amenable number.

121120001022221 is a deficient number, since it is larger than the sum of its proper divisors (22483762771).

121120001022221 is an equidigital number, since it uses as much as digits as its factorization.

121120001022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22483762770.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121120001022221 its reverse (122220100021121), we get a palindrome (243340101043342).

The spelling of 121120001022221 in words is "one hundred twenty-one trillion, one hundred twenty billion, one million, twenty-two thousand, two hundred twenty-one".