121404223357 has 2 divisors, whose sum is σ = 121404223358. Its totient is φ = 121404223356.

The previous prime is 121404223331. The next prime is 121404223387. The reversal of 121404223357 is 753322404121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76364348281 + 45039875076 = 276341^2 + 212226^2 .

It is a cyclic number.

It is not a de Polignac number, because 121404223357 - 2⁷ = 121404223229 is a prime.

It is a super-4 number, since 4×121404223357⁴ (a number of 45 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121404223387) 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 as a sum of consecutive naturals, namely, 60702111678 + 60702111679.

It is an arithmetic number, because the mean of its divisors is an integer number (60702111679).

Almost surely, 2^121404223357 is an apocalyptic number.

It is an amenable number.

121404223357 is a deficient number, since it is larger than the sum of its proper divisors (1).

121404223357 is an equidigital number, since it uses as much as digits as its factorization.

121404223357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 34.

Adding to 121404223357 its reverse (753322404121), we get a palindrome (874726627478).

The spelling of 121404223357 in words is "one hundred twenty-one billion, four hundred four million, two hundred twenty-three thousand, three hundred fifty-seven".