121023 has 24 divisors (see below), whose sum is σ = 213408. Its totient is φ = 64512.

The previous prime is 121021. The next prime is 121039. The reversal of 121023 is 320121.

It is a happy number.

It is not a de Polignac number, because 121023 - 2¹ = 121021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 120996 and 121014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1015 + ... + 1127.

It is an arithmetic number, because the mean of its divisors is an integer number (8892).

2¹²¹⁰²³ is an apocalyptic number.

121023 is a deficient number, since it is larger than the sum of its proper divisors (92385).

121023 is a wasteful number, since it uses less digits than its factorization.

121023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 121023 is about 347.8836012232. The cubic root of 121023 is about 49.4640081185.

Adding to 121023 its reverse (320121), we get a palindrome (441144).

It can be divided in two parts, 12 and 1023, that added together give a triangular number (1035 = T₄₅).

The spelling of 121023 in words is "one hundred twenty-one thousand, twenty-three", and thus it is an iban number.