121540610011775 has 24 divisors (see below), whose sum is σ = 152777269791120. Its totient is φ = 95899037149440.

The previous prime is 121540610011747. The next prime is 121540610011823. The reversal of 121540610011775 is 577110016045121.

It is not a de Polignac number, because 121540610011775 - 2¹² = 121540610007679 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124495241 + ... + 125467709.

It is an arithmetic number, because the mean of its divisors is an integer number (6365719574630).

Almost surely, 2^{121540610011775} is an apocalyptic number.

121540610011775 is a deficient number, since it is larger than the sum of its proper divisors (31236659779345).

121540610011775 is an equidigital number, since it uses as much as digits as its factorization.

121540610011775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041035 (or 1041030 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 41.

Adding to 121540610011775 its reverse (577110016045121), we get a palindrome (698650626056896).

The spelling of 121540610011775 in words is "one hundred twenty-one trillion, five hundred forty billion, six hundred ten million, eleven thousand, seven hundred seventy-five".