121040023 has 4 divisors (see below), whose sum is σ = 130350808. Its totient is φ = 111729240.

The previous prime is 121040021. The next prime is 121040033. The reversal of 121040023 is 320040121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121040023 - 2¹ = 121040021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 9310771 = 121040023 / (1 + 2 + 1 + 0 + 4 + 0 + 0 + 2 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121039985 and 121040012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121040021) 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 3 ways as a sum of consecutive naturals, for example, 4655373 + ... + 4655398.

It is an arithmetic number, because the mean of its divisors is an integer number (32587702).

Almost surely, 2^121040023 is an apocalyptic number.

121040023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121040023 is a deficient number, since it is larger than the sum of its proper divisors (9310785).

121040023 is an equidigital number, since it uses as much as digits as its factorization.

121040023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9310784.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 121040023 is about 11001.8190768618. The cubic root of 121040023 is about 494.6632719931.

Adding to 121040023 its reverse (320040121), we get a palindrome (441080144).

The spelling of 121040023 in words is "one hundred twenty-one million, forty thousand, twenty-three".