121124082221 has 4 divisors (see below), whose sum is σ = 128249028252. Its totient is φ = 113999136192.

The previous prime is 121124082199. The next prime is 121124082223. The reversal of 121124082221 is 122280421121.

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 107183557321 + 13940524900 = 327389^2 + 118070^2 .

It is a cyclic number.

It is not a de Polignac number, because 121124082221 - 2²⁶ = 121056973357 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 (121124082223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3562472990 + ... + 3562473023.

It is an arithmetic number, because the mean of its divisors is an integer number (32062257063).

Almost surely, 2^121124082221 is an apocalyptic number.

It is an amenable number.

121124082221 is a deficient number, since it is larger than the sum of its proper divisors (7124946031).

121124082221 is an equidigital number, since it uses as much as digits as its factorization.

121124082221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7124946030.

The product of its (nonzero) digits is 1024, while the sum is 26.

The spelling of 121124082221 in words is "one hundred twenty-one billion, one hundred twenty-four million, eighty-two thousand, two hundred twenty-one".