121121110200221 has 4 divisors (see below), whose sum is σ = 121185570612000. Its totient is φ = 121056649788444.

The previous prime is 121121110200179. The next prime is 121121110200247. The reversal of 121121110200221 is 122002011121121.

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 121121110200221 - 2¹⁴ = 121121110183837 is a prime.

It is a super-2 number, since 2×121121110200221² (a number of 29 digits) contains 22 as substring.

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 121121110200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121110209221) 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, 32230203071 + ... + 32230206828.

It is an arithmetic number, because the mean of its divisors is an integer number (30296392653000).

Almost surely, 2^{121121110200221} is an apocalyptic number.

It is an amenable number.

121121110200221 is a deficient number, since it is larger than the sum of its proper divisors (64460411779).

121121110200221 is an equidigital number, since it uses as much as digits as its factorization.

121121110200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64460411778.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121121110200221 its reverse (122002011121121), we get a palindrome (243123121321342).

The spelling of 121121110200221 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one hundred ten million, two hundred thousand, two hundred twenty-one".