121440040087 has 2 divisors, whose sum is σ = 121440040088. Its totient is φ = 121440040086.

The previous prime is 121440040049. The next prime is 121440040103. The reversal of 121440040087 is 780040044121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121440040087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121440040027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60720020043 + 60720020044.

It is an arithmetic number, because the mean of its divisors is an integer number (60720020044).

Almost surely, 2^121440040087 is an apocalyptic number.

121440040087 is a deficient number, since it is larger than the sum of its proper divisors (1).

121440040087 is an equidigital number, since it uses as much as digits as its factorization.

121440040087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168, while the sum is 31.

The spelling of 121440040087 in words is "one hundred twenty-one billion, four hundred forty million, forty thousand, eighty-seven".