121541155759 has 2 divisors, whose sum is σ = 121541155760. Its totient is φ = 121541155758.

The previous prime is 121541155741. The next prime is 121541155787. The reversal of 121541155759 is 957551145121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121541155759 - 2¹⁷ = 121541024687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121541155159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60770577879 + 60770577880.

It is an arithmetic number, because the mean of its divisors is an integer number (60770577880).

Almost surely, 2^121541155759 is an apocalyptic number.

121541155759 is a deficient number, since it is larger than the sum of its proper divisors (1).

121541155759 is an equidigital number, since it uses as much as digits as its factorization.

121541155759 is an evil number, because the sum of its binary digits is even.

The product of its digits is 315000, while the sum is 46.

The spelling of 121541155759 in words is "one hundred twenty-one billion, five hundred forty-one million, one hundred fifty-five thousand, seven hundred fifty-nine".