121440040019 has 2 divisors, whose sum is σ = 121440040020. Its totient is φ = 121440040018.

The previous prime is 121440040003. The next prime is 121440040027. The reversal of 121440040019 is 910040044121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121440040019 - 2⁴ = 121440040003 is a prime.

It is a super-2 number, since 2×121440040019² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121440040019.

It is not a weakly prime, because it can be changed into another prime (121440040049) 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, 60720020009 + 60720020010.

It is an arithmetic number, because the mean of its divisors is an integer number (60720020010).

Almost surely, 2^121440040019 is an apocalyptic number.

121440040019 is a deficient number, since it is larger than the sum of its proper divisors (1).

121440040019 is an equidigital number, since it uses as much as digits as its factorization.

121440040019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 121440040019 in words is "one hundred twenty-one billion, four hundred forty million, forty thousand, nineteen".