12121023 has 16 divisors (see below), whose sum is σ = 17047296. Its totient is φ = 7645440.

The previous prime is 12121009. The next prime is 12121061. The reversal of 12121023 is 32012121.

It is not a de Polignac number, because 12121023 - 2⁸ = 12120767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5788 + ... + 7598.

It is an arithmetic number, because the mean of its divisors is an integer number (1065456).

Almost surely, 2^12121023 is an apocalyptic number.

12121023 is a deficient number, since it is larger than the sum of its proper divisors (4926273).

12121023 is a wasteful number, since it uses less digits than its factorization.

12121023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 12121023 is about 3481.5259585417. The cubic root of 12121023 is about 229.7099241654.

Adding to 12121023 its reverse (32012121), we get a palindrome (44133144).

The spelling of 12121023 in words is "twelve million, one hundred twenty-one thousand, twenty-three".