121755142274687 has 2 divisors, whose sum is σ = 121755142274688. Its totient is φ = 121755142274686.

The previous prime is 121755142274639. The next prime is 121755142274807. The reversal of 121755142274687 is 786472241557121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121755142274687 - 2¹² = 121755142270591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121755142274287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60877571137343 + 60877571137344.

It is an arithmetic number, because the mean of its divisors is an integer number (60877571137344).

Almost surely, 2^{121755142274687} is an apocalyptic number.

121755142274687 is a deficient number, since it is larger than the sum of its proper divisors (1).

121755142274687 is an equidigital number, since it uses as much as digits as its factorization.

121755142274687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52684800, while the sum is 62.

The spelling of 121755142274687 in words is "one hundred twenty-one trillion, seven hundred fifty-five billion, one hundred forty-two million, two hundred seventy-four thousand, six hundred eighty-seven".