121024128127 has 12 divisors (see below), whose sum is σ = 138559392496. Its totient is φ = 103550716800.

The previous prime is 121024128109. The next prime is 121024128139. The reversal of 121024128127 is 721821420121.

It is not a de Polignac number, because 121024128127 - 2¹⁵ = 121024095359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121024128167) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2239627 + ... + 2293027.

Almost surely, 2^121024128127 is an apocalyptic number.

121024128127 is a deficient number, since it is larger than the sum of its proper divisors (17535264369).

121024128127 is an frugal number, since it uses more digits than its factorization.

121024128127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54546 (or 53977 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

Adding to 121024128127 its reverse (721821420121), we get a palindrome (842845548248).

The spelling of 121024128127 in words is "one hundred twenty-one billion, twenty-four million, one hundred twenty-eight thousand, one hundred twenty-seven".