121131550423123 has 2 divisors, whose sum is σ = 121131550423124. Its totient is φ = 121131550423122.

The previous prime is 121131550423049. The next prime is 121131550423127. The reversal of 121131550423123 is 321324055131121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121131550423123 - 2⁹ = 121131550422611 is a prime.

It is a super-4 number, since 4×121131550423123⁴ (a number of 57 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (121131550423127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60565775211561 + 60565775211562.

It is an arithmetic number, because the mean of its divisors is an integer number (60565775211562).

Almost surely, 2^{121131550423123} is an apocalyptic number.

121131550423123 is a deficient number, since it is larger than the sum of its proper divisors (1).

121131550423123 is an equidigital number, since it uses as much as digits as its factorization.

121131550423123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 121131550423123 in words is "one hundred twenty-one trillion, one hundred thirty-one billion, five hundred fifty million, four hundred twenty-three thousand, one hundred twenty-three".