121045435549 has 2 divisors, whose sum is σ = 121045435550. Its totient is φ = 121045435548.

The previous prime is 121045435513. The next prime is 121045435603. The reversal of 121045435549 is 945534540121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88182272025 + 32863163524 = 296955^2 + 181282^2 .

It is a cyclic number.

It is not a de Polignac number, because 121045435549 - 2¹¹ = 121045433501 is a prime.

It is a super-2 number, since 2×121045435549² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121045435649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60522717774 + 60522717775.

It is an arithmetic number, because the mean of its divisors is an integer number (60522717775).

Almost surely, 2^121045435549 is an apocalyptic number.

It is an amenable number.

121045435549 is a deficient number, since it is larger than the sum of its proper divisors (1).

121045435549 is an equidigital number, since it uses as much as digits as its factorization.

121045435549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432000, while the sum is 43.

The spelling of 121045435549 in words is "one hundred twenty-one billion, forty-five million, four hundred thirty-five thousand, five hundred forty-nine".