121004354221 has 2 divisors, whose sum is σ = 121004354222. Its totient is φ = 121004354220.

The previous prime is 121004354137. The next prime is 121004354243. The reversal of 121004354221 is 122453400121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116656402500 + 4347951721 = 341550^2 + 65939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121004354221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121004054221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60502177110 + 60502177111.

It is an arithmetic number, because the mean of its divisors is an integer number (60502177111).

Almost surely, 2^121004354221 is an apocalyptic number.

It is an amenable number.

121004354221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121004354221 is an equidigital number, since it uses as much as digits as its factorization.

121004354221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 121004354221 its reverse (122453400121), we get a palindrome (243457754342).

The spelling of 121004354221 in words is "one hundred twenty-one billion, four million, three hundred fifty-four thousand, two hundred twenty-one".