121440040049 has 2 divisors, whose sum is σ = 121440040050. Its totient is φ = 121440040048.

The previous prime is 121440040027. The next prime is 121440040087. The reversal of 121440040049 is 940040044121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89042560000 + 32397480049 = 298400^2 + 179993^2 .

It is a cyclic number.

It is not a de Polignac number, because 121440040049 - 2³² = 117145072753 is a prime.

It is not a weakly prime, because it can be changed into another prime (121440040019) 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, 60720020024 + 60720020025.

It is an arithmetic number, because the mean of its divisors is an integer number (60720020025).

Almost surely, 2^121440040049 is an apocalyptic number.

It is an amenable number.

121440040049 is a deficient number, since it is larger than the sum of its proper divisors (1).

121440040049 is an equidigital number, since it uses as much as digits as its factorization.

121440040049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 29.

The spelling of 121440040049 in words is "one hundred twenty-one billion, four hundred forty million, forty thousand, forty-nine".