121023123 has 16 divisors (see below), whose sum is σ = 176161440. Its totient is φ = 73453824.

The previous prime is 121023083. The next prime is 121023143. The reversal of 121023123 is 321320121.

121023123 is nontrivially palindromic in base 12.

It is not a de Polignac number, because 121023123 - 2¹² = 121019027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121023143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18408 + ... + 24101.

It is an arithmetic number, because the mean of its divisors is an integer number (11010090).

Almost surely, 2^121023123 is an apocalyptic number.

121023123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121023123 is a deficient number, since it is larger than the sum of its proper divisors (55138317).

121023123 is a wasteful number, since it uses less digits than its factorization.

121023123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42598.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 121023123 is about 11001.0509952459. The cubic root of 121023123 is about 494.6402487589.

Adding to 121023123 its reverse (321320121), we get a palindrome (442343244).

It can be divided in two parts, 12102 and 3123, that added together give a triangular number (15225 = T₁₇₄).

The spelling of 121023123 in words is "one hundred twenty-one million, twenty-three thousand, one hundred twenty-three".